Article
Energy & Fuels
Jingyu Zhao, Yang Liu, Hairui Yang, Haiying Qi
Summary: Reducing the particle size of bed material in coal-fired circulating fluidized bed boilers has been proven to significantly decrease nitrogen oxide (NOx) emissions, thereby achieving ultra-low emissions. The particle size directly affects the chemical reaction dynamics in coal combustion. Fine particles increase the catalytic surface area, enhancing NOx reduction and achieving ultra-low emissions.
Article
Energy & Fuels
Kassia Roberta Nogueira da Silva, Hugo Santos Pereira, Valter Aragao do Nascimento, Jorge Luiz Raposo Jr
Summary: This study developed the RP-DLLME sample preparation method and applied it to the determination of multiple metal elements in petroleum-derived samples using ICP OES. The RP-DLLME procedure was optimized and evaluated through multivariate statistical analysis. The results showed that this method has good accuracy and precision, making it a viable alternative for routine analysis.
Article
Energy & Fuels
Mohammed Ismael, Michael Wark
Summary: Spinel-type copper ferrite materials were prepared at different calcination temperatures using a citric acid-assisted sol-gel method. The influence of calcination temperature on the crystal structure, morphology, optical, and electrical properties of the materials was investigated. It was found that higher calcination temperatures resulted in larger particle sizes and better crystallinity. Photocatalytic activity for hydrogen production was also tested, and the material calcined at 900 degrees C exhibited higher activity due to its higher crystallinity and narrower bandgap energy. The role of Pt nanoparticles in enhancing the photocatalytic activity was further explained.
Article
Energy & Fuels
Oscar J. Martinez-Villabona, Marcia C. K. de Oliveira, Lina R. Morantes, Ana M. Percebom
Summary: Interfacial materials (IMs) formed aggregates with other components of the crude oils, affecting the rheological properties and stability of emulsions. Despite the low content of asphaltenes, the Brazilian crude oils could form stable emulsions. The naphthenic acids (NAs), although considered surfactants under certain conditions, did not significantly affect the physicochemical properties of the emulsions compared to IMs.
Article
Energy & Fuels
Kristina Ariskina, Guillaume Galliero, Amael Obliger
Summary: This study examines the impact of the flexibility of kerogens' microstructure on the transport of adsorbed CO2. It develops a free volume model that takes into account the adsorption-induced swelling exhibited by flexible kerogen structures. The study shows that the swelling increases the free volume accessible to CO2 molecules, leading to faster diffusion as the fluid loading increases. The diffusive nature of transport suggests that the self-diffusion coefficient can be used as a proxy for the collective diffusion coefficient. The study also demonstrates the applicability of the free volume model to the transport of light alkanes and mixtures, simplifying transport modeling for geological applications.
Article
Energy & Fuels
Jiang Bian, Ziyuan Zhao, Yang Liu, Ran Cheng, Xuerui Zang, Xuewen Cao
Summary: This study presents a novel method for ammonia separation using supersonic flow and develops a mathematical model to investigate the condensation phenomenon. The results demonstrate that the L-P nucleation model accurately characterizes the nucleation process of ammonia at low temperatures. Numerical simulations also show that increasing pressure and concentration can enhance ammonia condensation efficiency.
Article
Energy & Fuels
Shiyuan Pan, Xiaodan Shi, Beibei Dong, Jan Skvaril, Haoran Zhang, Yongtu Liang, Hailong Li
Summary: Integrating CO2 capture with biomass-fired combined heat and power (bio-CHP) plants is a promising method for achieving negative emissions. This study develops a reliable data-driven model based on the Transformer architecture to predict the flowrate and CO2 concentration of flue gas in real time. The model validation shows high prediction accuracy, and the potential impact of meteorological parameters on model accuracy is assessed. The results demonstrate that the Transformer model outperforms other models and using near-infrared spectral data as input features improves the prediction accuracy.
Article
Energy & Fuels
Mingqiu Wu, Haitao Li, Liang Wang, Shan Feng, Yu Wang, Ning Yang, Kai Wang, Minggao Yu
Summary: This study investigates the combustion characteristics, interaction, combustion reaction model, and kinetic parameters of coal/gangue co-combustion. The results reveal the effects of different mixing ratios on the combustion behavior and establish a predictive model for co-combustion.
Article
Energy & Fuels
Irek I. Mukhamatdinov, Mohammed O. N. Ali, Rezeda E. Mukhamatdinova, Boudkhil Affane, Alexey V. Vakhin, Sergey V. Tsvetkov, Sergey Ya. Malaniy, Alexander N. Protsenko
Summary: This study investigates the impact of process conditions on the composition and properties of high-viscosity oil extracted from the Strelovskoye field. It found that catalytic aquathermolysis has the potential for upgrading heavy oil and modifying its composition and properties.
Review
Energy & Fuels
Diya Agrawal, Navya Mahajan, Satyapaul A. Singh, I. Sreedhar
Summary: This study presents electrolysis and photocatalysis as the main methods for hydrogen production, discussing their challenges and potential. Alkaline water electrolysis is a commercial technology for large-scale hydrogen production, while proton exchange membrane electrolysis and solid oxide electrolysis cells are highly efficient. However, energy-efficient and economically feasible water electrolysis still face challenges. Photocatalysis is an efficient method that can enhance hydrogen production efficiency by manipulating catalyst characteristics.
Article
Energy & Fuels
Xiuyong Shi, Weiwei Qian, Song Li, Shijin Shuai
Summary: This investigation studied the effect of ammonia on the properties of soot in a laminar ethylene flame. The results showed that ammonia decreased the diameter of primary particles, increased the degree of graphitization, and reduced the proportion of oxygenated functional groups. The use of ammonia also decreased the oxidation activity of the particles.
Article
Energy & Fuels
Roland Balint, Markus Engblom, Jonne Niemi, Mikko Hupa, Leena Hupa
Summary: This study investigates the initial melting behavior of synthetic ash deposits and how it affects the final deposit morphology. The results show that the amount of melt formed during the experiment plays a crucial role in determining the deposit morphology. Two types of deposit morphologies, skeletal and molten, were identified, and their aging behaviors were found to differ. The findings provide important insights into the connection between deposit morphology and deposit aging.
Article
Energy & Fuels
Si Le Van, Keerti Vardhan Sharma, Mohammad Piri
Summary: This study investigates the effect of permeability and wetting condition on the performance of hydrocarbon foam for the first time. The results show a non-monotonic dependency of foam strength on permeability, and foam quality significantly influences foam performance. Furthermore, an increase in surfactant concentration improves foam strength.
Article
Energy & Fuels
Xiaoyuan Jiang, Shengqiang Yang, Buzhuang Zhou, Lin Lan
Summary: This paper investigated the effect of inert gas injection on reactive groups in coal at different stages of oxidation. The experimental results showed that inert gas had a significant inhibitory effect on the radical concentration and oxygen-containing radicals in coal.
Article
Energy & Fuels
Jinshu Huang, Jiasheng Chen, Zhuochun Huang, Tengyu Liu, Yan Ding, Hu Li, Chao He
Summary: A novel photothermal catalytic strategy was developed using a bio-based SO3H-functionalized graphenelike catalyst, which can efficiently upgrade biomass into high-quality biofuels under solvent-free and room-temperature conditions, and exhibits good stability and recyclability.
Article
Energy & Fuels
Zheng Li, Xiaoguang Wang, Jianlong Kou, Hai Sun, Yonghui Li, Liang Zheng, Jun Yao
Summary: Understanding the flow mechanisms of shale oil in nanopores is crucial for optimizing development strategies and enhancing recovery in shale oil reservoirs. This study used molecular dynamics simulations to investigate the flow of 26-component oil in authentic shale kerogen and quartz nanopores. The study revealed the nonlinear increase in flux due to flow regime transition with pressure gradient and identified the widening of quartz nanopores as the trigger for the transition. The study emphasized the importance of considering the multicomponent properties of shale oil and the roughness and composition of shale nanopores.
Article
Energy & Fuels
Meng He, Jingwei Wang, Jida Niu, Hao Lyu, Liqing Sun, Xiaofang You, Lin Li, Qingbiao Wang
Summary: A new method for preparing microemulsion collectors was designed through combined experiments and simulation, and the composition and optimal conditions were determined. The experimental results showed that the microemulsion collector has good stability for short-term storage and transportation, and can improve the yield of clean coal.
Article
Energy & Fuels
Yixuan Yu, Chengyan Li, Xiubo Min, Tianjun Sun
Summary: The study demonstrates that Al-CDC compound shows the highest CH4 adsorption capacity and selectivity, making it a promising adsorbent for CH4 separation from unconventional natural gas.
Article
Energy & Fuels
O. S. Gaidukova, V. V. Dorokhov, S. Y. Misyura, V. S. Morozov, N. E. Shlegel, P. A. Strizhak
Summary: The dissociation and combustion of methane hydrate samples were experimentally studied under different thermal conditions. The synergistic effects of simultaneously dissociating methane and carbon dioxide hydrates were analyzed. It was found that ignition of methane hydrate granules was faster than tablets, and increasing the combustion chamber temperature improved the ignition performance of tablets.
Article
Energy & Fuels
Shahriyar Safat Dipta, Md Habibur Rahaman, Walia Binte Tarique, Ashraful Hossain Howlader, Ayush Pratik, John A. Stride, Ashraf Uddin
Summary: Implementing a double-sided passivation approach can enhance the performance of n-i-p structured PSCs and improve the stability and photovoltaic properties of the cells.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
