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Article
Energy & Fuels
Chengxiong Dang et al.
Summary: Hydrogen production with in situ CO2 capture by sorption-enhanced steam reforming is a promising method to reduce CO2 emissions. However, the cyclic performance of SESR processes tends to deteriorate due to sintering. This study explores a recovery approach using Ni-Ca-Al layered double hydroxide structure with adsorbed tetracycline, which inhibits sintering and improves the performance of SESR.
Article
Energy & Fuels
Shucheng Liu et al.
Summary: Despite being important for efficient and clean lignite utilization, there are few studies on the downstream combustion and gasification characteristics of hydrothermal treatment dewatering (HTD). The present study examined the thermochemical characteristics and physicochemical structure of upgraded lignite by HTD and compared it with conventional flue gas treatment (FTD) processes. The results showed that HTD process promotes combustion reactivity, while both HTD and FTD processes decrease gasification reactivity of upgraded lignite.
Article
Energy & Fuels
Arshid Mahmood Ali et al.
Summary: Date palm waste (DPW) is a valuable waste product in the Middle East that can be utilized to generate sustainable energy. This study developed an integrated system model to predict gas composition and power generation from DPW. The results show that DPW can be converted into syngas, with varying gas composition and power generation depending on operating variables. This research highlights the potential of DPW for renewable fuel and electricity generation, offering an environmentally friendly solution for waste disposal.
Article
Thermodynamics
Caixia Bian et al.
Summary: In order to meet ultralow NOx emission standard, a 600 MWe tangentially-fired lignite boiler was retrofitted using air-staged combustion technology. Numerical simulations were conducted to study and compare the combustion and NOx emission characteristics of the original and retrofitted boiler. Different over-fired air ratios were tested in optimization simulations. Results showed that the retrofit reduced NOx emission by approximately 40%. An over-fired air ratio of 20% was found to be the most economical case, while a ratio of 25% was the most environmentally friendly. The results provide valuable insights for the retrofit and practical operation of similar lignite-fired boilers.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Mingqiang Gao et al.
Summary: The surface functional groups and pore structures of lignite oxidized at temperatures below 190 degrees C were studied, and the kinetics and thermodynamics of lignite combustion were analyzed. The results indicate that oxidation damages the pore structure and combustion performance of lignite, and thus should be avoided during storage, while the pore structure of oxidized lignite can be adjusted to enhance its combustion performance.
Article
Multidisciplinary Sciences
Shuzhuang Sun et al.
Summary: Achieving carbon neutrality is crucial, and integrated CO2 capture and utilization (ICCU) is an effective process for direct CO2 utilization. CeO2-CaO material shows superior catalytic performance in ICCU, with significantly improved CO2 conversion and selectivity. It also exhibits excellent cycle stability, making it a sustainable and efficient option for CO2 conversion.
ROYAL SOCIETY OPEN SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Ying Yue Teng et al.
Summary: The effects of removal and introduction of inherent minerals on the water reabsorption performance of coal samples were systematically investigated. It was found that the removal of inherent minerals significantly reduces the hygroscopic performance, but the pore structure becomes more developed and the surface oxygen-containing functional groups are more exposed after chemical treatment, leading to an increase in the equilibrium adsorbed moisture content (EMC). The interaction between lignite and water molecules is weakened by the removal of inherent minerals, but enhanced by the interaction between oxygen-containing functional groups on the surface of lignite and residual ash.
Review
Energy & Fuels
Tomasz Czakiert et al.
Summary: This paper presents the current development of chemical looping combustion (CLC) technology, which allows the burning of hydrocarbon fuels with reduced CO2 emissions. Different types of oxygen carriers and reactor constructions are discussed, as well as various concepts related to chemical looping.
Article
Green & Sustainable Science & Technology
Xuzhong Gong et al.
Summary: Coal is the dominant energy source in China, with 70% of polyvinyl chloride produced from coal-based CaC2. The solid waste generated from this process, known as calcium carbide slag (CCS), is mainly accumulated and poses environmental risks. However, CCS can be recycled to reduce the need for limestone extraction, leading to reduced CO2 emissions and solid waste pollution.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Review
Environmental Sciences
Dikai Xu et al.
Summary: Chemical looping technology utilizes a metal oxide oxygen carrier to oxidize biomass feedstock, potentially achieving negative carbon emission and enhanced energy efficiency. Various chemical looping processes have been studied at different scales to address key issues in biomass conversion.
WASTE AND BIOMASS VALORIZATION
(2022)
Review
Chemistry, Physical
S. Das et al.
Summary: This article discusses the limitations of hydrogen as an energy resource, as well as the methods of producing hydrogen using solar, biological, or electrical sources. Chemical-looping technology has gained widespread attention in recent years as a way to produce hydrogen, with the article also comparing the H-2 yield data of different oxygen carriers.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Environmental
Songhong Li et al.
Summary: This study investigates the effects of microwave pretreatment (MWP) on the steam gasification of spirit-based distillers' grains (SDGs), and finds that the addition of red mud (RM) can enhance the effect of MWP. The results show that MWP significantly improves the gasification rate, total gas yield, and H-2/CO ratio. Additionally, there is a synergistic catalytic mechanism between RM and MWP.
Review
Thermodynamics
Avishek Goel et al.
Summary: Biomass chemical looping gasification (BCLG) offers significant advantages in terms of gasification efficiency, CO2 capture, and reduced emissions, but further experimental and modeling studies are needed to advance its industrial applications.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Energy & Fuels
Yan Lin et al.
Summary: This paper investigates the effects of particle size and temperature on the chemical looping combustion of lignite using iron ore as the oxygen carrier. The modification of the oxygen carrier with Cu, K, Na, Ca and Mn effectively enhances the capacity for lignite transformation.
Review
Engineering, Chemical
Andrea Di Giuliano et al.
Summary: This review focuses on chemical looping combustion and chemical looping gasification as potential negative emission technologies for achieving sustainable development goals. By using solid materials as oxygen carriers, these technologies have the potential to reduce the cost and energy penalties associated with carbon capture and storage.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Energy & Fuels
Hongxia Wang et al.
Summary: This study proposes a carbon-calcium compound conversion system for the production of calcium carbide and evaluates its performance through material conversion, exergy and exergoeconomic analyses. The improved process shows better performance, allowing for the recycling of carbon and calcium and a reduction in carbon emissions.
Article
Energy & Fuels
Yan Lin et al.
Summary: The study investigates the effects of particle size and temperature on the chemical looping combustion (CLC) of lignite, using iron ore as the oxygen carrier with added alkaline-earth metals and transition metals. The modification of the oxygen carrier with Cu, K, Na, Ca, and Mn enhances its capacity to transform lignite and improve CO2 selectivity, with potential applications in the design of oxygen carriers for the CLC process.
Article
Green & Sustainable Science & Technology
Jie Yang et al.
Summary: Using carbide slag as absorbent, this study demonstrates a clean and cost-effective method to capture CO2 at low or even ambient temperature, achieving an absorption value of 18.13 wt%. The model of CO2 capture via gas-liquid-solid three-phase fluidization system based on two-film theory and Fick's law is proposed, providing insights for reusing industrial waste.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Environmental
Jinchen Ma et al.
Summary: This study investigated the fate of sulfur during in-situ gasification chemical looping combustion of coal, highlighting the resistance of Fe2O3/Al2O3 to sulfur and the positive effects of temperature and oxygen/fuel ratio on the conversion of sulfur compounds. Additionally, the research demonstrated the desulfurization function of coal ash and the effective conversion of sulfur-containing gases into SO2 using oxygen carrier materials.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Thermodynamics
Jie Yang et al.
Summary: This study investigated the feasibility of using industrial waste-carbide slag as the oxygen carrier, hydrogen carrier, and in-situ carbon capture agent for hydrogen production. Results showed that carbide slag could play important roles in the CCLG process.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Thermodynamics
Jie Yang et al.
Article
Energy & Fuels
Jie Yang et al.
Article
Chemistry, Multidisciplinary
Martha A. Arellano-Trevino et al.
JOURNAL OF CO2 UTILIZATION
(2019)
Article
Environmental Sciences
Jing Yang et al.
SCIENCE OF THE TOTAL ENVIRONMENT
(2019)
Article
Energy & Fuels
Jie Yang et al.
Article
Energy & Fuels
Jie Yang et al.
Article
Thermodynamics
Jie Yang et al.
APPLIED THERMAL ENGINEERING
(2017)