4.7 Review

Optimizing biomass pathways to bioenergy and biochar application in electricity generation, biodiesel production, and biohydrogen production

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Article Energy & Fuels

Correlating electrochemical biochar oxidation with electrolytes during biochar-assisted water electrolysis for hydrogen production

Yueyue Du et al.

Summary: Biochar-assisted water electrolysis (BAWE) for hydrogen production replaces the OER with more favorable BOR to reduce energy consumption. The type, concentration, and pH of the electrolyte were investigated for their effects on the BOR performance of the BAWE system. Results showed that 1 M KOH solution was more suitable as an electrolyte, and the alkaline BAWE system had higher electrochemical activity compared to conventional water electrolysis. Anion adsorption in acidic media restricted the BOR kinetics, while the diffusion coefficient of anodic reaction components reached a maximum value at pH 13.98, promoting the diffusion from the bulk solution to the electrode surface.
Article Chemistry, Physical

Catalytic decomposition of methane over enteromorpha prolifera-based hierarchical porous biochar

Shun Zhao et al.

Summary: Hierarchical porous biochar prepared from Enteromorpha prolifera (EP) by carbonization and H3PO4 activation showed excellent performance in methane decomposition (CMD). With H3PO4/EP ratio of 1.5, the biochar achieved a maximum CH4 conversion of 46% and hydrogen output of 396 mmol/gcat, 5.8 times higher than the unactivated biochar. The insertion of P element in the carbon layer as C-O-P, along with the formation of mesopores by H3PO4 activation, played key roles in enhancing the catalytic activity and mitigating catalyst deactivation.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2023)

Review Green & Sustainable Science & Technology

Thermophilic Anaerobic Digestion: An Advancement towards Enhanced Biogas Production from Lignocellulosic Biomass

Richa Singh et al.

Summary: Thermophilic anaerobic digestion (TAD) technology is globally adopted for its pathogen-free nature, high biogas yield, and short hydraulic retention time. The high metabolic rate and efficient enzymatic systems of thermophiles make them excellent inocula for lignocellulosic biomass degradation and biomethane production. TAD has advantages over mesophilic anaerobic digestion (MAD) in terms of kinetics, organic matter degradation, and economic and environmental sustainability. This review focuses on the role of thermophilic microorganisms as inocula in organic matter digestion and discusses strategies for enhancing the efficiency of thermophilic anaerobic digestion.

SUSTAINABILITY (2023)

Review Computer Science, Information Systems

An Overview of Biogas Production from Anaerobic Digestion and the Possibility of Using Sugarcane Wastewater and Municipal Solid Waste in a South African Context

Zikhona Tshemese et al.

Summary: Bioenergy production from waste is a viable solution for developing countries to address their unattended garbage issues. The usage of waste as a resource for producing valuable products, such as biofuels, aligns with the UN Sustainable Development Goals. Co-digestion of different waste substrates has shown higher biogas yields compared to individual substrates, making it a feasible alternative for energy production.

APPLIED SYSTEM INNOVATION (2023)

Review Chemistry, Multidisciplinary

Materials, fuels, upgrading, economy, and life cycle assessment of the pyrolysis of algal and lignocellulosic biomass: a review

Ahmed I. Osman et al.

Summary: Climate change necessitates the development of advanced carbon-neutral and circular methods for material and fuel production. This review focuses on the pyrolysis of algal and lignocellulosic biomass, analyzing the various products and mechanisms involved, as well as exploring techniques for upgrading the resulting oil. The economic viability and environmental impact of this process are also evaluated through life cycle assessments. The study finds that product yields are significantly influenced by the pyrolysis method and identifies key factors controlling the distribution of pyrolysis products. Furthermore, the potential of biochar in carbon dioxide sequestration and the economic feasibility of biochar and bio-oil generation are discussed.

ENVIRONMENTAL CHEMISTRY LETTERS (2023)

Review Chemistry, Multidisciplinary

Social, environmental, and economic consequences of integrating renewable energies in the electricity sector: a review

Mohamed Farghali et al.

Summary: The integration of renewable energies into the electricity sector can create employment opportunities, reduce water production costs and environmental impacts, and contribute to carbon emission reduction and climate change mitigation. Hybrid energy systems are more reliable in the face of climate change impacts on power supply.

ENVIRONMENTAL CHEMISTRY LETTERS (2023)

Review Chemistry, Multidisciplinary

Seaweed for climate mitigation, wastewater treatment, bioenergy, bioplastic, biochar, food, pharmaceuticals, and cosmetics: a review

Mohamed Farghali et al.

Summary: The development and recycling of biomass production can partially address issues related to energy, climate change, food and feed shortages, and environmental pollution. Seaweeds, for example, have the potential to reduce our reliance on fossil fuels, produce cost-effective and eco-friendly products and biofuels, and contribute to sustainable biorefinery processes.

ENVIRONMENTAL CHEMISTRY LETTERS (2023)

Review Chemistry, Multidisciplinary

Cost, environmental impact, and resilience of renewable energy under a changing climate: a review

Ahmed Osman et al.

Summary: Energy derived from fossil fuels has a significant impact on global climate change, but renewable energy sources must be utilized to reduce carbon emissions. Solar, wind, and biomass energy prices have been declining, but climate change may affect wind and hydropower production. Renewable energy sources can greatly reduce carbon emissions and contribute to climate change mitigation.

ENVIRONMENTAL CHEMISTRY LETTERS (2023)

Review Energy & Fuels

A comprehensive review on biogas production from lignocellulosic wastes through anaerobic digestion: An insight into performance improvement strategies

Mohsen Karrabi et al.

Summary: Recently, there has been growing interest in using organic or biodegradable wastes, including lignocellulosic wastes (LWs), as renewable energy sources. Anaerobic digestion (AD) of these wastes can mitigate environmental damage and produce biogas and bioenergy, which is particularly valuable in developing countries. However, there are several challenges to overcome, such as waste floating on top of reactors, high carbon-to-nitrogen ratio (CNR), complex structure of LWs, and poor degradability due to high lignin content. These challenges can be addressed through methods like mixing in reactors, reducing CNR, balancing inoculum-to-substrate ratio (ISR), and pretreatments. This study aims to review the literature on AD of LWs, identify existing challenges, and propose strategies to improve bioenergy production from this waste.
Article Energy & Fuels

Effect of Biomass Particle Size on the Torrefaction Characteristics in a Fixed-Bed Reactor

Yajing He et al.

Summary: The aim of this study is to investigate the influence of biomass particle size on the torrefaction characteristics. The results showed that biomass particle size did affect the product's evolution during biomass torrefaction. Comparatively, torrefaction temperature had a more significant effect on the composition of gas products than particle size and torrefaction time.

ENERGIES (2023)

Review Chemistry, Multidisciplinary

Recycling municipal, agricultural and industrial waste into energy, fertilizers, food and construction materials, and economic feasibility: a review

Xiaoxuan Peng et al.

Summary: The global amount of solid waste has increased dramatically due to population growth, urbanization, agricultural demand, and industrial development. Recycling methods are urgently needed to tackle this issue. Recent technologies have been reviewed for solid waste treatment, focusing on municipal, agricultural, and industrial waste. The conversion of waste into energy shows great potential, such as methane capture from landfills and anaerobic digestion systems for agricultural and food waste. Economic feasibility studies have shown positive results, with estimated costs and payback times for waste-to-energy technologies.

ENVIRONMENTAL CHEMISTRY LETTERS (2023)

Review Agricultural Engineering

Hydrothermal carbonization and Liquefaction: differences, progress, challenges, and opportunities

Daniel Lachos-Perez et al.

Summary: Hydrothermal liquefaction (HTL) and Hydrothermal Carbonization (HTC) are environmentally friendly and technologically innovative thermochemical processes that show significant differences in operation parameters, technical issues, and main products. Environmental and techno-economic assessments can evaluate the environmental sustainability and economic implications of these techniques. Perspectives and challenges are explored, along with integration approaches for hydrothermal valorization pathways and biorefining.

BIORESOURCE TECHNOLOGY (2022)

Review Agricultural Engineering

Recent advances and sustainable development of biofuels production from lignocellulosic biomass

A. Saravanan et al.

Summary: The conversion of biomass into biofuels is an innovative approach to address environmental pollution and reduce carbon emissions. Lignocellulosic biomass has attracted researchers around the world as a main feedstock for biofuel production, with various pretreatment methods being widely used to enhance hydrolysis rate and accessibility.

BIORESOURCE TECHNOLOGY (2022)

Article Agricultural Engineering

Characteristics of bio-oil and biochar from cotton stalk pyrolysis: Effects of torrefaction temperature and duration in an ammonia environment

An Zhao et al.

Summary: This study focused on preparing nitrogen-containing chemicals and nitrogen-rich biochar using ammonia torrefaction pretreatment technology, and evaluated the effects of temperature and duration on the characteristics of the products. It was found that higher torrefaction temperature led to increased nitrogen content and promoted the formation of quaternary-N while reducing other nitrogen species. Ammonia torrefaction was also found to promote pyridine formation and decrease oxygen-containing species, with torrefaction duration positively impacting the yield of nitrogen-containing chemicals.

BIORESOURCE TECHNOLOGY (2022)

Review Agricultural Engineering

Sustainable valorization of algae biomass via thermochemical processing route: An overview

Hafiz Muhammad Uzair Ayub et al.

Summary: This paper reviews the applications of thermochemical conversion techniques for biofuel production from algal biomass, emphasizing the potential of third-generation biofuels from microalgal feedstock. It highlights the benefits of pyrolysis over other processes in the thermochemical conversion of algal biomass.

BIORESOURCE TECHNOLOGY (2022)

Review Environmental Sciences

Lignocellulosic biomass-based pyrolysis: A comprehensive review

K. N. Yogalakshmi et al.

Summary: The article discusses the efficient application of lignocellulosic biomass for producing valuable chemicals, focusing on the pyrolysis conversion mechanism and influential parameters. It critically analyzes the environmental and economical aspects while addressing challenges and potential solutions in implementing lignocellulosic biomass pyrolysis.

CHEMOSPHERE (2022)

Article Environmental Sciences

Effects of temperature and total solid content on biohydrogen production from dark fermentation of rice straw: Performance and microbial community characteristics

Hong Chen et al.

Summary: The study found that biohydrogen production was higher in the thermophilic dark fermentation (TDF) compared to the mesophilic dark fermentation (MDF), with the highest yield at TS = 6%. The fermentation liquids in TDF had higher pH, NH4+-N, and total volatile fatty acids than those in MDF, indicating differences in microbial activity. Lactic acid-producing bacteria were found to be abundant at low TS content, while the highest biohydrogen production was associated with the highest abundance of hydrolytic bacteria at TS = 6%.

CHEMOSPHERE (2022)

Article Energy & Fuels

Fabrication and Characterization of Environmentally Friendly Biochar Anode

Ieva Kiminaite et al.

Summary: This study utilized Rhodophyta algae derived activated biochar as an anode with varying proportions of flaxseeds mucilage binder. Experimental results showed that the anode with 10 wt.% mucilage binder exhibited optimal performance in terms of thermal stability, mechanical strength, and electrical conductivity.

ENERGIES (2022)

Article Thermodynamics

Insights into the product quality and energy requirements for solid biofuel production: A comparison of hydrothermal carbonization, pyrolysis and torrefaction of olive tree pruning

J. Gonzalez-Arias et al.

Summary: In this study, olive tree pruning was subjected to dry (pyrolysis and torrefaction) and wet (hydrothermal carbonization) thermal treatments to produce solid biofuels. The products were evaluated in terms of yield, quality, and energy consumption. The results showed that chars produced from pyrolysis and torrefaction were coal-like with high heating values, while torrefaction had higher carbon content and energy content per kilogram of char produced, making it more profitable. The study also suggested potential improvements in energy balance by valorising gas and liquid phases in addition to the solid phase.

ENERGY (2022)

Article Thermodynamics

Improvement in biohydrogen and volatile fatty acid production from seaweed through addition of conductive carbon materials depends on the properties of the conductive materials

Chen Deng et al.

Summary: Fermentative production of biohydrogen and volatile fatty acids from advanced feedstocks such as seaweed offers opportunities in the carbon-neutral bioeconomy. However, the current challenge lies in improving fermentation efficiency related to seaweed's rigid structure and inefficient metabolic electron transfer within microbial communities. This study evaluated the effects of carbonaceous additives on biohydrogen fermentation of different substrates and found that graphene and wood-derived biochar showed superior performance in enhancing fermentation efficiency.

ENERGY (2022)

Article Thermodynamics

Distributed activation energy model for lignocellulosic biomass torrefaction kinetics with combined heating program

Yipeng Feng et al.

Summary: Torrefaction kinetics are crucial for theoretical investigation and industrial application. The Distributed Activation Energy Model (DAEM) effectively describes torrefaction kinetics at different temperatures, involving devolatilization, carbonization, and partial decomposition of biomass.

ENERGY (2022)

Article Thermodynamics

Improving water electrolysis assisted by anodic biochar oxidation for clean hydrogen production

Zhi Ying et al.

Summary: The study investigates the effectiveness of biochar-assisted water electrolysis for hydrogen production and analyzes the impact of the physicochemical properties of biochar on oxidation reactions. Several strategies for improvement were proposed based on the findings.

ENERGY (2022)

Article Energy & Fuels

Analysis of functionality distribution and microstructural characteristics of upgraded rice husk after undergoing non-oxidative and oxidative torrefaction

Lei Zhang et al.

Summary: The research demonstrates that torrefaction performed in flue gas atmosphere at 573 K for 30 min is the optimal condition for upgrading rice husk, and using flue gas as the carrier gas for biomass torrefaction is more effective and economical compared to N2 and air, resulting in improved fuel quality of rice husk.
Article Biochemistry & Molecular Biology

A Comparative Study of Various Pretreatment Approaches for Bio-Ethanol Production from Willow Sawdust, Using Co-Cultures and Mono-Cultures of Different Yeast Strains

Imen Ben Atitallah et al.

Summary: The effect of different pretreatment approaches based on alkali/hydrogen peroxide on willow sawdust biomass was investigated. The two-stage pretreatment approach led to higher delignification and saccharification efficiency, as well as higher ethanol concentration and yield. Co-cultures of Saccharomyces cerevisiae or Wickerhamomyces anomalus X19 with Pichia stipitis exhibited the highest ethanol yields.

MOLECULES (2022)

Review Thermodynamics

Current state of industrial heating and opportunities for decarbonization

Maxwell Pisciotta et al.

Summary: The IPCC recommends keeping the global average temperature increase well below 2 degrees C, if not below 1.5 degrees C, by 2100 to avoid the worst effects of climate change. This study focuses on industrial emissions in the United States, particularly in cement, lime, glass, and steelmaking industries, which are challenging to decarbonize. The paper explores different low-carbon solutions, such as carbon capture and storage, fuel switching, and technological changes, and emphasizes the importance of adapting these strategies to the local context.

PROGRESS IN ENERGY AND COMBUSTION SCIENCE (2022)

Review Agricultural Engineering

Pilot-scale co-processing of lignocellulosic biomass, algae, shellfish waste via thermochemical approach: Recent progress and future directions

Peter Nai Yuh Yek et al.

Summary: Thermal co-processing of lignocellulosic and aquatic biomass has shown potential for producing high-value energy products, and scaling up to pilot-scale operations is crucial. Design and operation of pilot-scale reactors, as well as key parameters for biomass co-processing, are discussed. Techno-economic analysis reveals factors influencing sustainability, and different processing methods have varying advantages.

BIORESOURCE TECHNOLOGY (2022)

Review Environmental Sciences

Catalytic pyrolysis of lignocellulosic biomass for bio-oil production: A review

Yi Wang et al.

Summary: This review summarizes recent findings on bio-oil production through catalytic pyrolysis using lignocellulosic biomass as feedstock. It explores and summarizes lignocellulosic biomass, structural components, and fundamentals of biomass catalytic pyrolysis. The current status of bio-oil yield and quality from catalytic fast pyrolysis is reviewed, and the potential effects of pyrolysis process parameters on bio-oil production are discussed. Techno-economic analysis and future prospects of catalytic pyrolysis for bio-oil production are also presented in this review.

CHEMOSPHERE (2022)

Review Green & Sustainable Science & Technology

Flash pyrolysis of biomass: a review of recent advances

Joshua O. Ighalo et al.

Summary: To meet global energy demands, increasing production of biofuels is necessary. Flash pyrolysis is an important method for converting biomass into eco-friendly biofuels, with high yields and fast processing.

CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY (2022)

Article Energy & Fuels

Valorization of peanut wastes into a catalyst in production of biodiesel

Minyoung Kim et al.

Summary: The study focused on converting peanut waste into biofuels through a thermochemical process, using biochar derived from pyrolysis of the waste as a catalyst to enhance reaction kinetics and lower reaction temperature. Biochars produced at different temperatures were effective in transesterification of soybean oil, showing higher yields compared to conventional methods.

INTERNATIONAL JOURNAL OF ENERGY RESEARCH (2022)

Review Chemistry, Physical

A review on bioconversion processes for hydrogen production from agro-industrial residues

A. Saravanan et al.

Summary: Hydrogen is a renewable and efficient energy source that provides a carbon-free environment. Unlike other fossil fuels, hydrogen combustion does not contribute to environmental pollution. Bioconversion of agro-industrial residues is an effective method for hydrogen production. This review provides detailed information on bioconversion processes, fermentation methods, and fuel cell systems, as well as factors affecting the production efficiency and purity of hydrogen during fermentation.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2022)

Article Chemistry, Physical

The one-step hydrothermal synthesis of CdS nanorods modified with carbonized leaves from Japanese raisin trees for photocatalytic hydrogen evolution

Mengying Xu et al.

Summary: The photocatalytic performance and stability of CdS nanorods can be enhanced by modifying them with carbon derived from biomass. The addition of biomass-derived carbon greatly accelerates the photocatalytic hydrogen production and improves the visible light stability of CdS nanorods.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2022)

Article Thermodynamics

A review of CaO based catalysts for tar removal during biomass gasification

Bin Li et al.

Summary: Tar is a major technical barrier for biomass gasification, but the use of CaO catalysts has been proven effective. This review examines the application of different types of CaO catalysts for tar removal and summarizes the tar cracking mechanism.

ENERGY (2022)

Review Chemistry, Multidisciplinary

Biochar for agronomy, animal farming, anaerobic digestion, composting, water treatment, soil remediation, construction, energy storage, and carbon sequestration: a review

Ahmed Osman et al.

Summary: Biochar, a versatile and recycled material, has found many applications in various sectors such as agriculture, animal farming, environmental remediation, and construction. It offers benefits such as promoting crop growth, improving animal health, reducing greenhouse gas emissions, and enhancing soil properties.

ENVIRONMENTAL CHEMISTRY LETTERS (2022)

Review Energy & Fuels

Recent advances in the application of biochar in microbial electrochemical cells

Sanchita Bipin Patwardhan et al.

Summary: This paper describes the characteristics of biochar and its novel applications in various fields such as soil stabilization, wastewater treatment, greenhouse gas management, and power generation. Research has found that biochar has potential applications in fuel cells and supercapacitors, particularly as electrodes in microbial fuel cells, where it exhibits significant performance.
Article Chemistry, Physical

The economics and the environmental benignity of different colors of hydrogen

A. Ajanovic et al.

Summary: Due to increasing greenhouse gas emissions and the use of renewable energy sources, interest in hydrogen is rising. This paper discusses various ways of hydrogen production and analyzes the economic and environmental performance of different hydrogen colors. It also examines the barriers for faster deployment of hydrogen in fuel cell vehicles. The major conclusion is that the environmental benefits of hydrogen use depend on the production methods and primary sources used.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2022)

Review Chemistry, Physical

Biomass gasification for sustainable energy production: A review

Ozgun Tezer et al.

Summary: Gasification process is an effective route for energy recovery from biomass, producing hydrogen-rich syngas. This paper provides a review of biomass gasification, comparing and analyzing different gasification models, designs, configurations, and operational conditions. It aims to present a holistic approach for hydrogen-rich syngas production based on current technologies, techno-economic analysis, and industrial/commercialization pathways. The article emphasizes the need to improve biomass gasification technologies for hydrogen production, considering global environmental and economic issues.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2022)

Review Green & Sustainable Science & Technology

Review on anaerobic digestion models: Model classification & elaboration of process phenomena

Samuel Emebu et al.

Summary: This article reviews mathematical models of anaerobic digestion (AD) and classifies them. In addition, it discusses the biochemical stages and other processes essential to AD, and reviews the models on these processes. The comprehensive approach of this review aims to evaluate the interdependence and individual and interactive effects of all processes, process factors, and process estimations on AD.

RENEWABLE & SUSTAINABLE ENERGY REVIEWS (2022)

Article Engineering, Environmental

Recycling spent water treatment adsorbents for efficient electrocatalytic water oxidation reaction

Zhijie Chen et al.

Summary: This study demonstrates a strategy for converting spent adsorbents into efficient electrocatalysts by boriding process. The metal ion-laden biochar-based spent adsorbents are transformed into magnetic metal borides/biochar heterostructures. The optimized catalyst exhibits low overpotential and high current density, outperforming many catalysts synthesized from commercial materials. The high catalytic efficiency is attributed to the well-dispersed nano-sized metallic borides, active metal (oxy)hydroxides, favorable charge-transfer kinetics, as well as the heterostructure and amorphous feature.

RESOURCES CONSERVATION AND RECYCLING (2022)

Article Biotechnology & Applied Microbiology

Integrating anaerobic digestion with hydrothermal pretreatment for bioenergy production: Waste valorization of plastic containing food waste and rice husk

Mohamed Farghali et al.

Summary: Combining hydrothermal treatment with anaerobic digestion can be an effective tool for climate change mitigation and waste management. The study found that the products generated from hydrothermal treatment at 30 minutes showed better solubilization in both solid and liquid fractions and had higher methane harvest.

BIOCHEMICAL ENGINEERING JOURNAL (2022)

Review Chemistry, Multidisciplinary

Integration of biogas systems into a carbon zero and hydrogen economy: a review

Mohamed Farghali et al.

Summary: The Ukraine conflict has created challenges in gas supplies and fertiliser prices, leading to increased interest in biogas as a local energy source and biofertiliser for agriculture. The biogas industry has the potential to significantly reduce global greenhouse gas emissions and contribute to carbon sequestration. Upgrading technologies can remove impurities from biogas and increase its methane content, while hydrogen-assisted biological biogas upgrading offers a way to convert carbon dioxide to biomethane. Furthermore, biogas systems can also produce biochar from digestate, which can be used as a biofertiliser or for other purposes.

ENVIRONMENTAL CHEMISTRY LETTERS (2022)

Review Chemistry, Physical

Hydrothermal Liquefaction of Lignocellulosic and Protein-Containing Biomass: A Comprehensive Review

Abdul Sattar Jatoi et al.

Summary: This article introduces the technology of hydrothermal liquefaction (HTL) and its application in the conversion of wet biomass. It discusses in detail the reaction mechanisms and influencing factors of HTL for lignocellulosic and high protein-containing feeds, and provides suitable recommendations.

CATALYSTS (2022)

Review Chemistry, Physical

Biomass-Derived Carbon Anode for High-Performance Microbial Fuel Cells

Jamile Mohammadi Moradian et al.

Summary: This review article focuses on the design and application of biomass-derived carbon anodes in microbial fuel cells (MFCs). Constructing carbon anodes from biomass has the advantage of improving the electrocatalytic behavior of the anodes. The article introduces different types of biomass-derived carbon anodes and analyzes their morphologies, characterizations, and carbonization processes. Finally, the drawbacks and prospects for biomass-derived carbon anodes are discussed.

CATALYSTS (2022)

Article Green & Sustainable Science & Technology

Biochar production from crop residues, its characterization and utilization for electricity generation in India

Abhijeet Anand et al.

Summary: This study investigates the potential of using biochar produced from crop residues as a substitute for coal in Indian thermal power plants. The results show that co-firing biochar with coal can reduce coal consumption and CO2 emissions in TPPs, and the cost of biochar conversion facilities is lower than that of new biomass to electricity generation facilities.

JOURNAL OF CLEANER PRODUCTION (2022)

Article Green & Sustainable Science & Technology

Gasification of municipal solid waste: Progress, challenges, and prospects

Muhammad Sajid et al.

Summary: Sustainable waste management is a crucial issue in modern societies, and scientific research aims to develop effective waste management strategies to address health and environmental concerns. Thermal treatments, particularly gasification, offer viable solutions for municipal waste management. This review critically examines different gasification technologies, feed alternatives, catalysts, and technology adoption. Mixed feedstock management, such as combining municipal solid waste with agricultural waste, can be a practical solution, although economic considerations and waste disposal regulations play important roles in design strategy and implementation.

RENEWABLE & SUSTAINABLE ENERGY REVIEWS (2022)

Article Chemistry, Physical

Modification of Graphite Sheet Anode with Iron (II, III) Oxide-Carbon Dots for Enhancing the Performance of Microbial Fuel Cell

Babita Tripathi et al.

Summary: The present study explores the use of carbon dots coated with iron (II, III) oxide (Fe3O4) as an anode in microbial fuel cells (MFC). Different concentrations of Fe3O4-carbon dots were coated onto graphite sheets, and their performance in MFC was evaluated. The modified anodes showed higher peak currents and fluxes compared to the bare graphite sheet anode, resulting in a significantly improved power density of the MFC. The increased interaction area of carbon dots enhanced the cell attachment capability of the anode, boosting the biocompatibility of Fe3O4@PSA-C.

CATALYSTS (2022)

Article Agricultural Engineering

Effect of the hydraulic retention time on the acidogenic fermentation of sewage sludge, wine vinasse and poultry manure for biohydrogen production

Leonor Sillero et al.

Summary: The present study aims to generate volatile fatty acids (VFA) and biohydrogen through the co-fermentation of sewage sludge, wine vinasse, and poultry manure at different hydraulic retention times (HRT). The results revealed that as the HRT decreased, the production of hydrogen and specific hydrogen increased. However, when the HRT dropped below 5 days, the yields and hydrogen production decreased.

BIOMASS & BIOENERGY (2022)

Article Engineering, Chemical

The emerging role of biochar in the carbon materials family for hydrogen production

Arvind K. Bhakta et al.

Summary: The energy crisis is a global priority, and there is a need for highly efficient materials for energy conversion, production, and storage systems. This comprehensive review focuses on the applications of biochar and nanocarbons in hydrogen evolution, highlighting the potential of biochar for sustainable material synthesis.

CHEMICAL ENGINEERING RESEARCH & DESIGN (2022)

Article Green & Sustainable Science & Technology

Carbon Footprint and Feedstock Quality of a Real Biomass Power Plant Fed with Forestry and Agricultural Residues

Alessio Ilari et al.

Summary: This study evaluated the quality of biomass residues from orchards and silviculture and the carbon footprint of a biomass power plant in Italy. The results showed that sourcing residual biomass materials for electricity generation close to power plants significantly reduce greenhouse gas emissions compared to conventional fossil fuels.

RESOURCES-BASEL (2022)

Article Engineering, Environmental

Potato peels as a sustainable source for biochar, bio-oil and a green heterogeneous catalyst for biodiesel production

Niran Daimary et al.

Summary: The sustainable processing approach was used to transform potato peel into bio-oil and green heterogeneous catalysts. The byproduct, biochar, was reused as a renewable and sustainable catalyst source. The synthesized catalyst showed high catalytic activity and oil conversion rate.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2022)

Article Engineering, Environmental

Restoration of acidified dry anaerobic digestion of food waste: Bioaugmentation of butyric acid-resistant microbes

Jiaxin Lu et al.

Summary: This study effectively restored an unstable acidified anaerobic digestion system by bioaugmenting with butyric-resistant microorganisms, leading to a decrease in butyrate concentration, an increase in methane production, and the maintenance of interspecies electron transfer relationships among microorganisms.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2022)

Article Chemistry, Physical

Biohydrogen production using horizontal and vertical continuous stirred tank reactor- a numerical optimization

Kathirvel Brindhadevi et al.

Summary: This study demonstrates a numerical approach to predicting biohydrogen and biogas production in horizontal and vertical continuous mixed tank reactors. It found that impeller speed has a significant impact on production rates, while the optimal ranges of HRT and pH are crucial factors.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2021)

Article Chemistry, Physical

Ferric oxide/date seed activated carbon nanocomposites mediated dark fermentation of date fruit wastes for enriched biohydrogen production

K. Rambabu et al.

Summary: Biohydrogen production from date-palm fruit wastes was studied using Enterobacter aerogenes by dark fermentation, with the addition of iron oxide nanoparticles and its nanocomposites enhancing hydrogen yield and productivity. Fe3O4/DSAC nanocomposites showed better hydrogen production enhancement than Fe3O4 NPs, with optimal dosage observed at 150 mg/L. Metabolites analysis indicated that hydrogen evolution followed the ethanol-acetate pathway, with Fe3O4/DSAC reducing the formation levels of longer chain co-metabolites. The nanocomposites exhibited significant application potential for biohydrogen production from date fruit wastes.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2021)

Article Green & Sustainable Science & Technology

Ammonia control represents the key for PM2.5 elimination: insights for global air pollution control interconnected from PM2.5 events in China

Binfan Jiang et al.

Summary: PM2.5, an aerosol particulate, is a global environmental issue with severe impacts on human health and climate. Studying the characteristics and control strategies of PM2.5 pollution in China can provide insights for global air pollution control. Control measures should focus on reducing ammonia emissions from various sources in order to further abate PM2.5 pollution.

CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY (2021)

Article Green & Sustainable Science & Technology

Comparison of atmospheric and gas-pressurized oxidative torrefaction of heavy-metal-polluted rice straw

Mengjiao Tan et al.

Summary: The oxidative torrefaction of heavy metal-polluted rice straw was studied under different conditions to compare the effects on torrefled products' properties. The results showed that rice straw torrefaction under gas-pressurized conditions had better combustion performance, while the identification and prediction of atmospheric pressure torrefied rice straw could be achieved through color parameters. Gas-pressurized torrefaction can be used as a low-cost, safe pre-treatment for heavy metal-polluted rice straw.

JOURNAL OF CLEANER PRODUCTION (2021)

Article Electrochemistry

Preparation, characterization, and optimization of a porous polyaniline-copper anode microbial fuel cell

S. Mwale et al.

Summary: This study developed and optimized a copper anode material coated with a thin polyaniline layer for microbial fuel cells. The polyaniline materials doped with formic acid demonstrated the highest conductivity and the best inhibition effect on copper degradation. Additionally, the polyaniline-copper electrode showed promising performance in the H-type microbial fuel cell, achieving a high power density and low internal resistance.

JOURNAL OF SOLID STATE ELECTROCHEMISTRY (2021)

Article Plant Sciences

Bioelectricity production using plant-microbial fuel cell: Present state of art

Rukhsar Shaikh et al.

Summary: Recycling of organic waste is crucial for addressing the global energy crisis, with MFC technology considered a potential alternative solution, particularly the P-MFC technology which converts solar energy into bioelectricity using plant-microorganism rhizospheric relationship.

SOUTH AFRICAN JOURNAL OF BOTANY (2021)

Article Agricultural Engineering

Residue cornstalk derived biochar promotes direct bio-hydrogen production from anaerobic fermentation of cornstalk

Lei Zhao et al.

Summary: In this study, an innovative approach using RCA-biochar derived from residue cornstalk was proposed to enhance direct bio-hydrogen production. The addition of RCA-biochar increased bio-hydrogen production potential and maximum production rate, mainly due to providing more specific surface area for hydrogen-producing bacteria attachment and promoting cellulolytic enzyme activity. These findings may support effective and sustainable lignocellulosic bio-hydrogen production in the future.

BIORESOURCE TECHNOLOGY (2021)

Review Agricultural Engineering

A review on lignocellulosic biomass waste into biochar-derived catalyst: Current conversion techniques, sustainable applications and challenges

Yi Wen Low et al.

Summary: Biochar, a thermo-chemical conversion product generated from lignocellulosic biomass, has great physicochemical properties and catalytic activities, mainly through gasification and pyrolysis techniques. This review discusses the modification, physical properties, characterization techniques, and applications of biochar, comparing its performance with conventional catalysts. The study suggests that biochar-derived catalyst from lignocellulosic biomass waste could be an alternative to conventional catalysts with further in-depth research.

BIOMASS & BIOENERGY (2021)

Article Engineering, Environmental

Modified graphene oxide anode: A bioinspired waste material for bioremediation of Pb2+ with energy generation through microbial fuel cells

Asim Ali Yaqoob et al.

Summary: This study utilized oil palm biomass waste-derived graphene derivatives as a novel anode material in MFCs and further improved the efficiency of MFCs by fabricating composite anodes to treat Pb2+ wastewater. The results demonstrate that the composite anode exhibited higher efficiency, power density, and current density compared to the single L-GO anode.

CHEMICAL ENGINEERING JOURNAL (2021)

Review Agricultural Engineering

Hydrothermal liquefaction of lignocellulose for value-added products: Mechanism, parameter and production application

Ying-Hong Xu et al.

Summary: This review summarizes and discusses the reaction mechanism, main influence factors, and production application of hydrothermal liquefaction of lignocellulose. It focuses on the reaction mechanism of the structural components of lignocellulose and discusses in detail the influence factors. The limitations and prospects of hydrothermal liquefaction of lignocellulose are also pointed out.

BIORESOURCE TECHNOLOGY (2021)

Article Agricultural Engineering

Effect of slow pyrolysis conditions on biocarbon yield and properties: Characterization of the volatiles

B. Babinszki et al.

Summary: Slow pyrolysis of spruce and birch was conducted under different heating programs and conditions in a quartz tube reactor heated by an electric furnace. The study found that spruce produced more char yield than birch, and the main gaseous products showed similar evolution profiles. The relative amount of aromatic and polyaromatic compounds in volatile matter decreased significantly with increasing carbonization temperature.

BIORESOURCE TECHNOLOGY (2021)

Article Agricultural Engineering

Dynamic membrane bioreactor for high rate continuous biohydrogen production from algal biomass

Young-Bo Sim et al.

Summary: This study achieved continuous biohydrogen production from red algal biomass using a dynamic membrane bioreactor. Metabolic flux analysis revealed butyric acid and propionic acid as major by-products of the pathways involved in hydrogen production and consumption. The study also identified microbial species that play significant roles in hydrogenase and CoA-transferase expression.

BIORESOURCE TECHNOLOGY (2021)

Article Thermodynamics

A multi-stage co-gasification system of biomass and municipal solid waste (MSW) for high quality syngas production

Yisheng Hu et al.

Summary: The study simulated air and air-steam co-gasification of switchgrass and municipal solid waste using Aspen Plus software, analyzing the effects of co-gasification and steam/feed ratios on gas composition and gasification performance. Results showed higher gasification efficiency and product yield under specific conditions, but some parameters exhibited a decrease in performance with increasing CGR and S/F ratios.

ENERGY (2021)

Article Chemistry, Physical

Effect of biochar in enhancing hydrogen production by mesophilic anaerobic digestion of food wastes: The role of minerals

Yusron Sugiarto et al.

Summary: The study found that the main elements Fe, K, and Ca in biochar help promote the production of H-2 hydrogen, especially increasing the dominance of Clostridium butyricum, thereby increasing the hydrogen production yield.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2021)

Review Green & Sustainable Science & Technology

Biomass gasification using dual fluidized bed gasification systems: A review

Naresh Hanchate et al.

Summary: Biomass gasification is a widely explored research area for synthetic gas production. Dual fluidized bed gasifiers are a recent technology capable of producing medium heating value syngas.

JOURNAL OF CLEANER PRODUCTION (2021)

Article Thermodynamics

The evolution of renewable energy and its impact on carbon reduction in China

Huanyu Zheng et al.

Summary: China is under unprecedented pressure to control its carbon emissions, but the development of renewable energy can effectively reduce carbon emission intensity. Different levels of renewable energy development have inhibitory effects on carbon emissions, with a smaller direct impact but a larger indirect impact on carbon emissions.

ENERGY (2021)

Review Energy & Fuels

Hydrogen Production Technologies: From Fossil Fuels toward Renewable Sources. A Mini Review

Pedro J. Megia et al.

Summary: This study reviews and compares different technologies for hydrogen production using renewable and non-renewable resources. The results show that biomass gasification and steam reforming technologies have promising features in terms of hydrogen yield, energy efficiency, and operational costs.

ENERGY & FUELS (2021)

Review Energy & Fuels

Combustion of Biomass in Fluidized Beds: A Review of Key Phenomena and Future Perspectives

K. Y. Kwong et al.

Summary: This review summarizes recent advances in fluidized bed combustion of solid biomass, particularly focusing on combustion stages and the impact of fluidized beds on the process. It aims to summarize research lessons learned, identify remaining gaps in knowledge, and discuss future research trends and technology development prospects.

ENERGY & FUELS (2021)

Article Thermodynamics

Co-gasification of woody biomass with organic and waste matrices in a down-draft gasifier: An experimental and modeling approach

Federica Barontini et al.

Summary: This study presented an extensive experimental campaign on the co-gasification of virgin wood biomass with organic and waste matrices in a full-scale downdraft air gasifier. The results showed that the gasifier maintained good gasification performance using different mixtures, with the potential to reach cold gasification efficiencies around 80% by adjusting secondary air flow and preheating of the gasifying air. The developed pseudo-kinetic model of the gasifier was able to accurately predict the gasifier performance and enhance syngas quality.

ENERGY CONVERSION AND MANAGEMENT (2021)

Review Thermodynamics

Progress in biomass torrefaction: Principles, applications and challenges

Wei-Hsin Chen et al.

Summary: The development of biofuels is important for reducing CO2 emissions, and torrefaction is seen as the most efficient route. Despite the drawbacks of solid biomass fuels, torrefaction technology is gaining attention for its potential benefits.

PROGRESS IN ENERGY AND COMBUSTION SCIENCE (2021)

Article Chemistry, Analytical

Comprehensive utilization of agricultural wastes by combined wet torrefaction and pyrolysis

Yuan Xue et al.

Summary: Wet torrefaction (WT) has the potential to convert moist biomass into hydrophobic fuel with higher heating value and energy density. The combination of wet torrefaction and pyrolysis allows for comprehensive utilization of biomass. Torrefied liquid is promising for furfural and organic acid production, while torrefied solid products have improved properties and enhanced removal of AAEMs.

JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS (2021)

Article Green & Sustainable Science & Technology

Bio-oil from biomass fast pyrolysis: Yields, related properties and energy consumption analysis of the pyrolysis system

Pan Li et al.

Summary: Through a comprehensive study of biomass fluidized bed devices and fast pyrolysis experiments to produce bio-oil, optimal production parameters were determined. The analysis of bio-oil properties revealed differences between first-level and second-level bio-oil. Energy consumption mainly went towards preheating and cooling nitrogen, but byproducts such as coke and non-condensable gas could be utilized for self-heating production.

JOURNAL OF CLEANER PRODUCTION (2021)

Article Chemistry, Multidisciplinary

Biochar Nanocomposite Derived from Watermelon Peels for Electrocatalytic Hydrogen Production

Zhou Yang et al.

Summary: The carbon-based nanocomposite CCW-x derived from watermelon peels and CoCl2 shows good electrocatalytic performance in both oxygen evolution reaction and hydrogen evolution reaction, with lower overpotential and higher Tafel slope. Assembling a water-splitting electrocatalyst with nickel foam loaded with CCW-700 as the anode and cathode in 1 M KOH results in low water-splitting voltage.

ACS OMEGA (2021)

Article Energy & Fuels

Impacts of COVID-19 on energy demand and consumption: Challenges, lessons and emerging opportunities

Peng Jiang et al.

Summary: COVID-19 pandemic has caused significant challenges to the energy industry, affecting energy demand and consumption in complex spatial and temporal ways. The additional energy consumed for COVID-19 fighting plays a crucial role in stabilizing energy demand, and there are significant regional differences in energy recovery post-pandemic. Finding and allocating energy-related emerging opportunities is a key issue to address for the future.

APPLIED ENERGY (2021)

Article Agricultural Engineering

Gas-pressurized torrefaction of biomass wastes: Co-gasification of gas-pressurized torrefied biomass with coal

Shan Tong et al.

Summary: The co-gasification of biomass and coal offers a cleaner way of utilizing fossil fuel, with the improved properties of biomass enhancing the syngas quality and synergistic effect during gasification. A novel gas-pressurized torrefaction method effectively upgrades biomass under mild conditions, significantly promoting coal gasification through synergistic effects. The kinetic model RPM was found to be the most fitting for co-gasification, with reduced activation energy and increased CO yield.

BIORESOURCE TECHNOLOGY (2021)

Article Energy & Fuels

The enhanced rich H2 from co-gasification of torrefied biomass and low rank coal: The comparison of dry/wet torrefaction, synergetic effect and prediction

Zhen He et al.

Summary: This study enhanced the H2 gas production by co-gasifying torrefied biomass and low-rank coal in a fixed bed reactor. The change in fundamental compositions in biomass after torrefaction played an important role in improving H2 yield, with dry torrefaction being more beneficial. The synergetic effect observed between dry torrefied biomass and coal in certain ratios was mainly due to catalytic species and the transfer of active radicals.
Article Energy & Fuels

Effect of oxidative torrefaction on high temperature combustion process of wood sphere

Xin Li et al.

Summary: The study demonstrates that oxidative torrefaction (OT) affects the combustion process of wood spheres, increasing char yield and combustion time while forming a more cross-linked aromatic structure that hinders volatile release, resulting in denser and heavier char particles. The findings suggest that mass yield serves as a good indicator for both OT and traditional inert torrefaction processes.
Article Energy & Fuels

Utilization of renewable and sustainable basic heterogeneous catalyst from Heteropanax fragrans (Kesseru) for effective synthesis of biodiesel from Jatropha curcas oil

Sanjay Basumatary et al.

Summary: This study examines the use of a green catalyst derived from Heteropanax fragrans in the production of Jatropha curcas biodiesel. The catalyst exhibited high basicity and reusability, resulting in efficient catalytic performance under optimal conditions. The findings suggest that this catalyst is a promising option for biodiesel production with significant implications for reducing overall costs.
Article Energy & Fuels

Characterisation and utilization of heterogeneous catalyst from waste rice-straw for biodiesel conversion

Omprakash Sahu

Summary: Global demand for fuel is increasing, leading to higher utilization of fossil fuels and decreased stocks. The development of unconventional fuels, such as biodiesel, is essential due to the large amount of toxic gases emitted and the high risks associated with non-renewable fuels. A study focused on utilizing waste rice straw to create a heterogeneous alkaline catalyst for biodiesel conversion, achieving up to 93.7% conversion efficiency. This research highlights the potential for utilizing waste biomass and waste-free fatty acid materials in industrial applications.
Article Green & Sustainable Science & Technology

Environmental and energy performance of residual forest biomass for electricity generation: Gasification vs. combustion

Andrei Briones-Hidrovo et al.

Summary: The study evaluates and compares the environmental and energy performance of direct gasification and combustion using residual forest biomass in Portugal. Gasification performs environmentally better than combustion in most impact categories, but combustion has a higher Energy-Returned-On-Energy-Invested ratio. The study concludes that gasification may be a good alternative to current combustion systems in Portugal.

JOURNAL OF CLEANER PRODUCTION (2021)

Article Green & Sustainable Science & Technology

Torrefaction of biomass: Production of enhanced solid biofuel from municipal solid waste and other types of biomass

Kabir Abogunde Abdulyekeen et al.

Summary: The rapid increase in population has led to the abundant generation of municipal solid waste, which can be converted to energy. Utilizing MSW as a renewable fuel addresses various issues and the torrefaction process is a promising method for pre treating MSW for energy generation.

RENEWABLE & SUSTAINABLE ENERGY REVIEWS (2021)

Article Green & Sustainable Science & Technology

Gasification of municipal solid waste blends with biomass for energy production and resources recovery: Current status, hybrid technologies and innovative prospects

Zeeshan Hameed et al.

Summary: This paper critically reviews the current status of utilizing municipal solid waste and biomass blends for energy and resource recovery, and identifies opportunities for future development. Among various thermochemical conversion techniques, gasification is considered a promising technology for sustainable waste management system, reducing pollution and maximizing energy and materials recovery. The properties of municipal solid waste and biomass differ, but both have the potential to produce value-added products through gasification, leading to reduced toxic elements and harmful gases in the environment.

RENEWABLE & SUSTAINABLE ENERGY REVIEWS (2021)

Article Green & Sustainable Science & Technology

Is solar power renewable and carbon-neutral: Evidence from a pilot solar tower plant in China under a systems view

Xudong Wu et al.

Summary: While solar power is often seen as a renewable and carbon-neutral energy source, studies have shown that it still has non-renewable energy costs and substantial carbon emissions. However, compared to coal-based power, solar power remains a promising alternative with lower non-renewable energy costs and carbon emissions per unit of electricity delivered.

RENEWABLE & SUSTAINABLE ENERGY REVIEWS (2021)

Article Green & Sustainable Science & Technology

Will China achieve its renewable portfolio standard targets? An analysis from the perspective of supply and demand

Jing-Li Fan et al.

Summary: 1. If all provinces can implement their respective renewable energy planning, the renewable power supply will exceed the renewable portfolio standard targets by about 488 TWh. 2. Guangdong, Shanghai, Jiangsu, Zhejiang and Chongqing will experience the greatest lack of renewable electricity, with a shortfall of 320 TWh, representing 77% of the total renewable portfolio standard target. 3. The greatest shortfall of non-hydro power will occur in Beijing, Jiangsu, Tianjin and Zhejiang, accounting for approximately 69% of the total non-hydro power shortfall. 4. China's renewable portfolio standard policy will further promote the optimal allocation of renewable energy resources among provinces through inter-provincial transactions.

RENEWABLE & SUSTAINABLE ENERGY REVIEWS (2021)

Review Green & Sustainable Science & Technology

Biomass pyrolysis technologies for value-added products: a state-of-the-art review

Andrew N. Amenaghawon et al.

Summary: Biomass pyrolysis is an efficient thermochemical route for producing pyrolytic gas, bio-oil, and solid biochar with wide applications. The process efficiency is influenced by factors such as temperature, pretreatment methods, and the use of catalysts. Advanced experimental methods like Py-GC-MS/FID and TG-MS/TG-FTIR have been developed for biomass pyrolysis research.

ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY (2021)

Article Biotechnology & Applied Microbiology

Valorization of waste chicken egg shells towards synthesis of heterogeneous catalyst for biodiesel production: Optimization and statistical analysis

Wasi Ur Rahman et al.

Summary: The study elucidates the synthesis of Zn/CaO catalyst from waste chicken egg shells for biodiesel production using waste frying oil as feedstock. Significant factor analysis and parametric optimization were conducted using the Taguchi approach. The optimized conditions led to a maximum biodiesel yield of 93.27% with key factors being catalyst concentration and reaction temperature.

ENVIRONMENTAL TECHNOLOGY & INNOVATION (2021)

Article Chemistry, Multidisciplinary

Carbon Nano-Fiber/PDMS Composite Used as Corrosion-Resistant Coating for Copper Anodes in Microbial Fuel Cells

Fatma Bensalah et al.

Summary: The study presents the development of a new coating for Cu anode material in Microbial Fuel Cells, enhancing its performance by reducing corrosion rate and improving electrical conductivity and electrochemical properties. The optimal weight ratio of CNF/PDMS mixture was found to be 8%, resulting in the best electrical conductivity and electrochemical properties.Additionally, the study showed that the highest power density was achieved with a 500 μm thick CNF-PDMS coating, significantly outperforming unmodified Cu anodes in terms of stability and power output.

NANOMATERIALS (2021)

Article Engineering, Chemical

Use of Biochar-Based Cathodes and Increase in the Electron Flow by Pseudomonas aeruginosa to Improve Waste Treatment in Microbial Fuel Cells

Rosa Anna Nastro et al.

Summary: This study investigated the combined use of biochar-based material and Pseudomonas aeruginosa in MFCs, compared to a composite cathode system in terms of electric performance. The results showed that biochar demonstrated good performance in terms of reutilization and maintaining a stable pH range, while the addition of Pseudomonas aeruginosa significantly increased power output levels.

PROCESSES (2021)

Article Green & Sustainable Science & Technology

Energy recovery potential from Brazilian municipal solid waste via combustion process based on its thermochemical characterization

Andrea Carolina Gutierrez-Gomez et al.

Summary: This study investigates direct combustion with energy recovery as a treatment method for wet waste in Brazil. Through thermochemical characterization, the energy recovery potential of waste is calculated, highlighting the possibility of using auxiliary fuels for waste combustion in some regions, which can reduce landfill amounts and contribute electrical energy to the national energy matrix.

JOURNAL OF CLEANER PRODUCTION (2021)

Review Green & Sustainable Science & Technology

A review about pretreatment of lignocellulosic biomass in anaerobic digestion: Achievement and challenge in Germany and China

Yafan Cai et al.

Summary: This review comprehensively analyzes the development, application, and challenges of pretreatment methods for lignocellulosic biomasses (LBs) based on different characteristics in China and Germany. Physical, chemical, and biological pretreatments have their own advantages and disadvantages, and combination pretreatment modes should be explored in future research. The differences in LBs characteristics between China and Germany suggest the need for a comprehensive analysis of pretreatment methods to provide references for other countries with similar substrate characteristics.

JOURNAL OF CLEANER PRODUCTION (2021)

Article Engineering, Chemical

Wet Torrefaction of Poultry Litter in a Pilot Unit: A Numerical Assessment of the Process Parameters

Rafail Isemin et al.

Summary: A numerical model for wet torrefaction of poultry litter was developed in this study, which successfully estimated the optimal duration required for the process. The model employed a black box approach and assumed the behavior of the fluidized-bed reactor to be similar to a completely stirred tank reactor. Validation using experimental data confirmed the reliability of the model in estimating process duration based on material properties, reactor size, and feedstock characteristics.

PROCESSES (2021)

Review Environmental Sciences

Renewable biohydrogen production from lignocellulosic biomass using fermentation and integration of systems with other energy generation technologies

Shashi Kant Bhatia et al.

Summary: Biohydrogen is a clean and renewable energy source produced through various technologies, with dark fermentation being considered more sustainable and ecofriendly. Utilizing lignocellulosic biomass for biohydrogen production shows great potential, and advancements in pretreatment technology and fermentation techniques have made this technology efficient and capable of meeting future energy demands. Co-production of biohydrogen with other energy resources can further improve efficiency and economics.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

Article Environmental Sciences

The Influence of Hydropower and Coal Consumption on Greenhouse Gas Emissions: A Comparison between China and India

Ugur Korkut Pata et al.

Summary: The study discovered the existence of the Pollution Haven Hypothesis in China and India, with its validity varying according to different carbon indicators. Based on the results, effective policy practices can be implemented by replacing coal and hydropower with more effective renewable energy sources and allowing foreign investors to focus on environmental issues.
Article Green & Sustainable Science & Technology

Co-Combustion of Blends of Coal and Underutilised Biomass Residues for Environmental Friendly Electrical Energy Production

Fariha Kanwal et al.

Summary: The study revealed that the combustion of a blend containing 60% coal and 40% sunflower residue was the most efficient, resulting in less emission of NOx, SOx, and CO2 compared to pure coal combustion. The results suggest great potential for using selected biomass residues in blend with coal for environmentally friendly and sustainable energy production.

SUSTAINABILITY (2021)

Review Agronomy

Biochar and Its Broad Impacts in Soil Quality and Fertility, Nutrient Leaching and Crop Productivity: A Review

Hiba M. Alkharabsheh et al.

Summary: Biochar is gaining attention for its potential benefits in carbon sequestration, improving soil health, enhancing fertility, and increasing crop productivity and quality. Studies show that adding biochar can improve soil fertility, nitrogen use efficiency, aeration, and water retention, leading to increased crop growth.

AGRONOMY-BASEL (2021)

Article Agricultural Engineering

Microbial fuel cell for harvesting bio-energy from tannery effluent using metal mixed biochar electrodes

M. Naveenkumar et al.

Summary: The study focused on reducing electrode costs and environmental pollution by utilizing waste materials, particularly coconut shells for electrode synthesis. Among the different synthesized electrodes, the CS-Cu-0.2 electrode showed the highest power output, indicating its potential for sustainable and cost-effective application in microbial fuel cells.

BIOMASS & BIOENERGY (2021)

Article Agricultural Engineering

Food waste treating by biochar-assisted high-solid anaerobic digestion coupled with steam gasification: Enhanced bioenergy generation and porous biochar production

Jingxin Zhang et al.

Summary: This study proposed a food waste treating system by combining biochar-assisted high-solid anaerobic digestion and subsequent steam gasification, which effectively produced methane-enriched biogas, hydrogen-enriched syngas, and nutrient-enriched biochar.

BIORESOURCE TECHNOLOGY (2021)

Article Energy & Fuels

The Effect of Detoxification of Lignocellulosic Biomass for Enhanced Methane Production

Katarzyna Kotarska et al.

Summary: Detoxification of lignocellulosic biomass has been shown to increase methane yield and enhance organic matter decomposition during the methane fermentation process. Additionally, a two-step pretreatment with alkaline/enzymatic treatment and detoxification is necessary for effective generation of high methane concentration biogas.

ENERGIES (2021)

Article Thermodynamics

Comparative indexes, fuel characterization and thermogravimetric-Fourier transform infrared spectrometer-mass spectrogram (TG-FTIR-MS) analysis of microalga Nannochloropsis Oceanica under oxidative and inert torrefaction

Congyu Zhang et al.

Summary: The torrefaction performances of microalga Nannochloropsis Oceanica under oxidative and inert atmospheres were compared based on operating parameters, with results suggesting that oxidative torrefaction enhances energy efficiency and yield. Peak temperatures of torrefied microalgae increased, particularly in oxidative atmosphere, while oxidative torrefaction was found to be more reactive and suitable for producing bio-oil with specific components.

ENERGY (2021)

Article Energy & Fuels

Catalytic Pyrolysis of Methane to Hydrogen over Carbon (from cellulose biochar) Encapsulated Iron Nanoparticles

Rahul Kundu et al.

Summary: In this study, the catalytic performance of carbon encapsulated iron nanoparticles (CEINPs) for methane decomposition was investigated. The 30% CEINP exhibited the highest catalytic activity at 800 degrees C, while the 40% CEINP showed lower methane conversions due to aggregation of iron nanoparticles.

ENERGY & FUELS (2021)

Article Thermodynamics

Two-step thermodegradation kinetics of cellulose, hemicelluloses, and lignin under isothermal torrefaction analyzed by particle swarm optimization

Wei-Hsin Chen et al.

Summary: Recognition of isothermal thermodegradation of cellulose, hemicelluloses, and lignin is crucial for upgrading lignocellulosic biomass and producing biochar through torrefaction. The study employs a two-step model with PSO algorithm to predict the kinetics of torrefaction at different temperatures. Results show that cellulose exhibits the highest weight loss and volatile product generation, while hemicelluloses have severe weight loss at 250 degrees C, and lignin demonstrates higher thermal resistance to torrefaction. FTIR spectra indicate that CO and CO2 are the dominant gases in the torrefaction process.

ENERGY CONVERSION AND MANAGEMENT (2021)

Article Thermodynamics

Enhancing biochar oxidation reaction with the mediator of Fe2+/Fe3+ or NO2-/NO3- for efficient hydrogen production through biochar-assisted water electrolysis

Zhi Ying et al.

Summary: The addition of Fe2+/Fe3+ or NO2-/NO3- mediators can significantly enhance the oxidation activity of biochar-assisted water electrolysis process, leading to improved hydrogen production efficiency and reduced energy consumption.

ENERGY CONVERSION AND MANAGEMENT (2021)

Review Chemistry, Multidisciplinary

Conversion of biomass to biofuels and life cycle assessment: a review

Ahmed Osman et al.

Summary: The global energy demand is projected to increase by nearly 28% by 2040, leading to a growing interest in utilizing biomass as a renewable energy source for producing biofuels. Life cycle assessment plays a crucial role in providing insights into the environmental impacts associated with biofuel production chains. The integration of thermochemical and biochemical conversion routes shows promise for enhancing process efficiency in biomass-to-biofuel conversion, with ongoing research and publication efforts focusing on addressing knowledge gaps in the field.

ENVIRONMENTAL CHEMISTRY LETTERS (2021)

Article Energy & Fuels

Torrefaction of Short Rotation Coppice Willow. Characterization, hydrophobicity assessment and kinetics of the process

Ana Alvarez et al.

Summary: Short Rotation Coppice Willow (SRCW) is a new source of renewable energy improved through torrefaction, which enhances hygroscopicity and heating value for use as fuel. The non-oxidative and oxidative torrefaction of SRCW were compared, with optimal temperature resulting in high mass and energy yields, reduced moisture content, and changes in elemental ratios. The biomass becomes hydrophobic with increased contact angle and decreased water absorption.
Article Biotechnology & Applied Microbiology

Oxidative torrefaction performance of microalga Nannochloropsis Oceanica towards an upgraded microalgal solid biofuel

Congyu Zhang et al.

Summary: Oxidative torrefaction is effective in enhancing the thermal properties of microalgal solid biofuels, with increasing severity leading to improved hydrophobicity and thermal stability. NMR analysis indicates that oxidative torrefaction promotes decomposition of specific bonds and aromatization. Through XPS analysis, torrefaction operation results in decreased carbide carbon and increased graphitization, ultimately improving the thermal stability of the torrefied microalgae.

JOURNAL OF BIOTECHNOLOGY (2021)

Article Green & Sustainable Science & Technology

The relationship of renewable energy consumption to fi nancial development and economic growth in China

Juan Wang et al.

Summary: This study examines the long-term and short-term impacts of economic growth and financial development on renewable energy consumption in China, finding that economic growth stimulates renewable energy consumption while financial development has a negative impact. Additionally, there is a unidirectional causality relationship from financial development to renewable energy consumption.

RENEWABLE ENERGY (2021)

Article Engineering, Environmental

In situ N-, P- and Ca-codoped biochar derived from animal bones to boost the electrocatalytic hydrogen evolution reaction

Lifang Deng et al.

Summary: An in situ N-, P- and Ca-codoped biochar catalyst was successfully prepared from animal bone, showing high atomic contents and synergistic effects. The catalyst exhibited outstanding performance and stability in hydrogen production from water electrolysis, surpassing synthetic materials in catalytic activity.

RESOURCES CONSERVATION AND RECYCLING (2021)

Article Biotechnology & Applied Microbiology

Modern trend of anodes in microbial fuel cells (MFCs): An overview

Asim Ali Yaqoob et al.

Summary: This review discusses the different conventional and modern anode materials used in microbial fuel cells, emphasizing the advantages of natural biomass-derived materials in addressing challenges. It also introduces some limitations of natural-derived anodes that can be addressed through metal oxide composites.

ENVIRONMENTAL TECHNOLOGY & INNOVATION (2021)

Article Chemistry, Multidisciplinary

Overview of Feedstocks for Sustainable Biodiesel Production and Implementation of the Biodiesel Program in Pakistan

Zulqarnain et al.

Summary: The exponentially increasing energy demand of the world necessitates a transition to renewable energy such as biofuels to combat environmental pollution and oil shortages. By synthesizing biodiesel through catalytic transesterification, countries like Pakistan can reduce oil imports, enhance economic growth, and minimize production costs for successful implementation. Research on innovative solvents and catalysts is crucial for further cost reduction and successful biodiesel implementation.

ACS OMEGA (2021)

Article Engineering, Environmental

Thermophilic anaerobic digestion of Sargassum fulvellum macroalgae: Biomass valorization and biogas optimization under different pre-treatment conditions Mohamed

Mohamed Farghali et al.

Summary: The study demonstrated that the utilization of Sargassum fulvellum macroalgae in anaerobic digestion systems, especially the biologically treated digesters, can significantly enhance methane yield. Chemical pretreatments also showed to increase methane output, but raw untreated algae proved to be a better option in comparison.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2021)

Article Engineering, Environmental

Biomass-derived composite anode electrode: Synthesis, characterizations, and application in microbial fuel cells (MFCs)

Asim Ali Yaqoob et al.

Summary: Biomass-derived graphene oxide and its modification with metal oxide as an anode electrode show high bioremediation efficiency and energy output in microbial fuel cells. Biological characterization reveals dominant species such as Klebsiella pneumoniae on the surface of composite anodes.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2021)

Review Chemistry, Multidisciplinary

A review on non-edible oil as a potential feedstock for biodiesel: physicochemical properties and production technologies

Marwan Abdul Hakim Shaah et al.

Summary: There is growing concern about finding an alternative to petroleum-derived fuels due to the depletion of fossil fuels, population growth, and urbanization. Biodiesel, derived from edible crops, faces limitations such as potential food supply depletion and high production costs, leading researchers to consider using non-edible oil as a feedstock, which presents a significant opportunity for biodiesel production.

RSC ADVANCES (2021)

Review Engineering, Environmental

Biochar application as sustainable precursors for enhanced anaerobic digestion: A systematic review

Zaied Bin Khalid et al.

Summary: Anaerobic digestion with biochar can enhance methane production and organic removal efficiency, but there is still a lack of detailed understanding of the relationship between biochar and anaerobic digestion. The properties of biochar can improve biomethane yield by adjusting pH, acting as a disinfectant, and promoting microbial growth.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2021)

Article Engineering, Environmental

Comparative life cycle energy and greenhouse gas footprints of dry and wet torrefaction processes of various biomass feedstocks

Maryam Akbari et al.

Summary: This study compares the life cycle energy consumption and greenhouse gas emissions of electricity generation from bio-coals produced from various biomass feedstocks via dry torrefaction and wet torrefaction processes. Results show that most pathways are competitive with coal-based electricity in terms of GHG emissions, with pine woodchips biochar-based electricity generation being the best option in terms of emissions reduction and net energy ratios. Sensitivity analysis of various factors was conducted, and the developed information can be used for investment decisions and policy formulation globally.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2021)

Article Chemistry, Multidisciplinary

One-step preparation of eggplant-derived hierarchical porous graphitic biochar as efficient oxygen reduction catalyst in microbial fuel cells

Zhengtai Zha et al.

Summary: The study introduces a one-step strategy for synthesizing hierarchical porous graphitic biochar derived from eggplants, which is efficient, cost-effective, and environmentally friendly. The EPGC-800-2 catalyst shows excellent electrochemical performance with higher half-wave potential in neutral medium and superior power density in a microbial fuel cell compared to Pt/C catalyst.

RSC ADVANCES (2021)

Review Green & Sustainable Science & Technology

Biomass pyrolysis: past, present, and future

Tamer Y. A. Fahmy et al.

ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY (2020)

Article Environmental Sciences

Potential of Biochar-Anode in a Ceramic-Separator Microbial Fuel Cell (CMFC) with a Laccase-Based Air Cathode

Pimprapa Chaijak et al.

POLISH JOURNAL OF ENVIRONMENTAL STUDIES (2020)

Review Agricultural Engineering

Energy production from steam gasification processes and parameters that contemplate in biomass gasifier - A review

Samarjeet Singh Siwal et al.

BIORESOURCE TECHNOLOGY (2020)

Article Green & Sustainable Science & Technology

An insight into carbon balance of product streams from hydrothermal liquefaction of Scenedesmus abundans biomass

PanneerSelvam SundarRajan et al.

RENEWABLE ENERGY (2020)

Article Agricultural Engineering

Alkali-catalyzed liquefaction of pinewood sawdust in ethanol/water co-solvents

Yulin Hu et al.

BIOMASS & BIOENERGY (2020)

Article Agricultural Engineering

Effects of biochar on ethanol-type and butyrate-type fermentative hydrogen productions

Weiming Li et al.

BIORESOURCE TECHNOLOGY (2020)

Article Environmental Sciences

Effect of operating parameters on hydrothermal liquefaction of corn straw and its life cycle assessment

Shiqiu Zhang et al.

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH (2020)

Review Chemistry, Physical

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