Article
Energy & Fuels
Dan Li, Yuan Bao, Yaya Wang, Chao An, Jianing Chang
Summary: The aim of microbially-enhanced coalbed methane (MECBM) generation is to simulate the natural process of microbial methane production and increase coalbed methane production. This study investigated the changes in pore and molecular structures during the bioconversion of coal to methane. The results showed that MECBM is a process of carbon enrichment, nitrogen/sulfur fixation, and dehydrogenation/deoxygenation. Microbes modify the coal pore structure by destroying aliphatic side chains, dissociating small molecular clusters, and reducing the degree of aromaticity. This changes the coal reservoir spatial structure, resulting in the transformation of micropores to transition pores and mesopores, and increasing the average pore width and reducing the specific surface area. This process benefits the desorption and transportation of coalbed methane.
Article
Engineering, Environmental
Jin-Di Liu, Xiang-Ming Hu, Yue Feng, Yan-Yun Zhao, Ming-Yue Wu, Xu-Wei Wang, Xiao-Xiao Yu, Chun-Yu Song, Qing-Shan Wang, Zhi Geng, Ding-Chen Shen, Hao-Yu Wang
Summary: In this study, a biosurfactant-producing bacteria was screened from coal and its species, types, and composition of biosurfactants were determined. The analysis revealed that the biosurfactants were glycolipids with different structures. The biosurfactant-producing bacteria showed effective production of biosurfactants with improved wetting effect compared to common chemical surfactants.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Geosciences, Multidisciplinary
Dong Xiao, Mohamed Keita, Hailun He, Enyuan Wang, Yidong Zhang, Huan He, Jing Ma
Summary: The study investigated the regularity of anaerobic fermentation in coal during coal crack development through tests and analyses. It was found that the level of crack development in coal is positively correlated with coal permeability and effect of air diffusion in the cracks. The research has engineering guiding significance for revealing the influence of coal fragmentation on coal biogasification in the stress concentration zone of the mining area.
NATURAL RESOURCES RESEARCH
(2021)
Article
Environmental Sciences
Junlian Gao, Chenghe Guan, Bo Zhang, Ke Li
Summary: A study on China's coal mine methane (CMM) emissions between 2010 and 2019 revealed that the annual emissions were estimated at 20.11 Tg with a decline trend. Factors such as the growth of CMM utilization, shift to lower-emission coal mining areas, and decrease of emission factors contributed to curbing the increasing trend of China's CMM emissions since 2012.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Article
Engineering, Environmental
Gang Liu, Shushi Peng, Xin Lin, Philippe Ciais, Xinyu Li, Yi Xi, Zihan Lu, Jinfeng Chang, Marielle Saunois, Yuxuan Wu, Prabir Patra, Naveen Chandra, Hui Zeng, Shilong Piao
Summary: Anthropogenic methane emissions in China increased by 40% in the 2000s and showed a slowdown after 2010, mainly attributed to controlled coal mine emissions and energy policies in China.
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2021)
Article
Engineering, Chemical
Qing Chen, Zhiqiang Huang, Hao Huang, Qi Chen, Xingjie Ling, Fubin Xin, Xiangwei Kong
Summary: Coalbed methane reservoirs are susceptible to coal fines generation during hydraulic fracturing, which negatively impacts the conductivity of the propped fracture. This study conducted conductivity tests on coal rock fractures to assess the effect of particle size ratio in composite proppant blends on fracture conductivity. The findings indicate that controlling the proportion of large and small particles is important for short-term and long-term conductivity, respectively, for efficient hydraulic fracturing in coalbed methane reservoirs.
Article
Energy & Fuels
Qiusheng Ye, Chengwu Li, Tao Yang, Yilin Wang, Zhenfei Li, Yifan Yin
Summary: This study investigates the desorption and diffusion of methane in coal seams using an experimental system, and finds that the desorption process is a heat absorption and cooling process influenced by equilibrium pressure and the particle size of the coal samples. The results have important implications for accurately measuring coal bed methane content and preventing and controlling coal mine gas disasters.
Article
Energy & Fuels
Kuo Jian, Xuehai Fu, Zhaoying Chen, Mi Li, Xiangqian Xu, Yuanyuan Guo, Jian Liu, Mingjie Liu
Summary: The gas production mechanism and geochemical characteristics of biogenic coalbed methane were investigated through a simulation experiment using two pieces of lignite as the degradation substrate and coal seam native bacteria as the bacteria source. The experiment lasted for 90 days and showed that the gas generation mode is mainly acetic acid fermentation under anaerobic closed circumstances, with low gas production efficiency. The major components of biogas are CH4 and CO2, and the gas composition is dry. The gas production process can be divided into three stages: rapid growth, fluctuating growth, and decline. Isotope fractionation effects cause changes in the carbon isotopic composition of CH4 and CO2, with lighter delta C-13(CH4) and heavier delta C-13(CO2) values.
Article
Chemistry, Analytical
Ben Niu, Ruichun Liu, Juntao Zhang, Runkun Shi, Hanbin Zhong, Jiaofei Wang
Summary: This study investigated coal pyrolysis in O-2/CH4 atmosphere using an atmospheric fixed-bed reactor. It was found that the addition of O-2 to CH4 can enhance tar formation, with significant effects on tar yield, fraction distribution, and composition. The results show that the addition of O-2/CH4 as pyrolysis atmosphere can improve the content and distribution of various components in tar compared to CH4 and N-2 atmospheres.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2021)
Article
Energy & Fuels
Liangwei Xu, Keji Yang, Lei Chen, Luofu Liu, Zhenxue Jiang, Jintao Zhu, Heng Wu
Summary: H2S is a toxic and reactive gas found in coal mines, posing serious risks. However, research on H2S generation mechanism in coal seams is rare and information on concentration anomalies is limited. This study simulated different conditions of H2S generation from coal by combining high-temperature and high-pressure sealed simulations of thermochemical sulfate reduction (TSR). The results provide insights into the mechanisms and factors affecting H2S generation during coal pyrolysis and TSR reaction.
Article
Energy & Fuels
Jie Li, Yan Zhang, Wenpo Shan, Hong He
Summary: A series of mesoporous Pd/Al2O3 and Pd/MgAl2O4 catalysts with different palladium contents (0.5, 1 and 4 wt%) were prepared and used for methane combustion. The 1Pd/MgAl2O4 (1 wt% Pd) catalyst showed highly efficient catalysis for methane combustion below 450 degrees C, with a low apparent activation energy of around 50.1 kJ/mol and good thermal stability. The superior catalytic performance of Pd/MgAl2O4 can be attributed to the strong interaction between the MgAl2O4 spinel and PdO species, which promotes species dispersion and stability. In addition, the catalytic activity of Pd/MgAl2O4 showed a volcano-shaped dependence on the size of Pd particles, indicating the importance of strong metal-support interaction.
Article
Chemistry, Physical
Jinpeng Bai, Nan Xiao, Yuwei Wang, Hongqiang Li, Chang Liu, Jian Xiao, Yibo Wei, Zhen Guo, Jieshan Qiu
Summary: Carbon dots (CDs) with tunable size were synthesized from coal tar pitch using a hydrothermal method with NaOH as additive. The obtained CDs demonstrated high crystallinity and the size could be regulated by adjusting the amount of NaOH added. Increasing the size of the CDs from 1.9 to 5.8 nm resulted in a 70% improvement in the solar-to-hydrogen efficiency when Pt was supported on the CDs.
Article
Energy & Fuels
Elham Rahimi, Shimin Liu, Meng Wang
Summary: Co-bioconversion of coal and anaerobic digestion sludge is an innovative approach to managing waste materials and producing valuable products such as biogas and biofertilizers. This study investigates the effects of different media combinations on the bioconversion process and finds that the use of formation water and nutrients leads to maximum biogas production in a short period, while mixing coal-sludge with deionized water results in maximum cumulative biogas production over a longer duration.
Article
Geochemistry & Geophysics
Lun Wu, Liqiang Ma, Gen Huang, Jihui Li, Hongxiang Xu
Summary: This study investigated the occurrence and distribution of rare earth elements (REEs) in a fly ash sample from a coal-fired power plant in Guizhou province using multiple analysis methods. The results showed that a part of the rare earth particles was encapsulated within the glass body and could be released by wet grinding, increasing the acid-leaching recovery of REEs. This study provides valuable information for developing economically viable and environmentally sustainable technology for recovering REEs from coal fly ash.
Article
Chemistry, Physical
Wencheng Yang, Jianbo Zhang, Lei Zhang, Jingying Li, Yonghui Bai, Ze Yan, Xiaoxun Ma, Cuili Hou, Wengui Yao
Summary: Partial gasification of coal char with addition of metal oxides can co-produce fuel gas and methane decomposition catalysts. Fe and Fe-Co composite oxides are found to be effective catalysts for fuel gas production, while Ni-based catalysts exhibit high and stable methane conversion in catalytic methane decomposition (CMD).
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Nanoscience & Nanotechnology
Anne Anderson, Joan McLean, Paul McManus, David Britt
INTERNATIONAL JOURNAL OF NANOTECHNOLOGY
(2017)
Article
Agriculture, Multidisciplinary
Michelle Bonebrake, Kaitlyn Anderson, Jonathan Valiente, Astrid Jacobson, Joan E. McLean, Anne Anderson, David W. Britt
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2018)
Article
Agriculture, Multidisciplinary
Anne J. Anderson, Joan E. McLean, Astrid R. Jacobson, David W. Britt
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2018)
Article
Plant Sciences
Kwang-Yeol Yang, Stephanie Doxey, Joan E. McLean, David Britt, Andre Watson, Dema Al Qassy, Astrid Jacobson, Anne J. Anderson
Article
Environmental Sciences
Paul McManus, Joshua Hortin, Anne J. Anderson, Astrid R. Jacobson, David W. Britt, Joseph Stewart, Joan E. McLean
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
(2018)
Article
Chemistry, Multidisciplinary
Abul Bashar Mohammad Giasuddin, Anthony Cartwright, Kyle Jackson, David W. Britt
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2019)
Article
Biochemistry & Molecular Biology
Abul Bashar Mohammad Giasuddin, David W. Britt
Article
Biochemistry & Molecular Biology
Abul Bashar Mohammad Giasuddin, David W. Britt
Article
Agriculture, Multidisciplinary
Andrew T. Gagon, David W. Britt, Luis J. Bastarrachea
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2020)
Article
Food Science & Technology
Andrew T. Gagon, David W. Britt, Luis J. Bastarrachea
LWT-FOOD SCIENCE AND TECHNOLOGY
(2020)
Article
Agronomy
Michel Esper Neto, David W. Britt, Lorena Moreira Lara, Anthony Cartwright, Rayssa Fernanda dos Santos, Tadeu Takeyoshi Inoue, Marcelo Augusto Batista
Review
Agronomy
Anthony Cartwright, Kyle Jackson, Christina Morgan, Anne Anderson, David W. Britt
Article
Plant Sciences
Anne J. J. Anderson, Joshua M. M. Hortin, Astrid R. R. Jacobson, David W. W. Britt, Joan E. E. McLean
Summary: This study focuses on the effects of drought and microbial root colonization on metabolites in shoots and rhizosphere with metal-chelation properties. The findings show that drought leads to the accumulation of amino acids in shoots, while microbial colonization has little effect on the metabolites. However, an active microbial root colonization generally reduces the metabolites in rhizosphere solutions, which may contribute to biocontrol of pathogen growth. The study also predicts the formation of Fe-Ca-gluconates, ion forms of Zn, and the chelation of Cu with the siderophore 2'-deoxymugineic acid, low molecular weight organic acids, and amino acids. Therefore, the changes in metabolites caused by drought and microbial root colonization have potential impacts on plant vigor and metal bioavailability.
Article
Chemistry, Multidisciplinary
J. M. Hortin, A. J. Anderson, D. W. Britt, A. R. Jacobson, J. E. McLean
ENVIRONMENTAL SCIENCE-NANO
(2019)
Article
Energy & Fuels
Yingna Du, Chen Huang, Wei Jiang, Qiangwei Yan, Yongfei Li, Gang Chen
Summary: In this study, anionic surfactants modified hydrotalcite was used as a flow improver for crude oil under low-temperature conditions. The modified hydrotalcite showed a significant viscosity reduction effect on crude oil. The mechanism of the modified hydrotalcite on viscosity and pour point of crude oil was explored through characterization and analysis of the modified hydrotalcite and oil samples.
Article
Energy & Fuels
Mohammad Saeid Rostami, Mohammad Mehdi Khodaei
Summary: In this study, a hybrid structure, MIL-53(Al)@MWCNT, was synthesized by combining MIL-53(Al) particles and -COOH functionalized multi-walled carbon nanotube (MWCNT). The hybrid structure was then embedded in a polyethersulfone (PES) polymer matrix to prepare a mixed matrix membrane (MMM) for CO2/CH4 and CO2/N2 separation. The addition of MWCNTs prevented MIL-53(Al) aggregation, improved membrane mechanical properties, and enhanced gas separation efficiency.
Article
Energy & Fuels
Yunlong Li, Desheng Huang, Xiaomeng Dong, Daoyong Yang
Summary: This study develops theoretical and experimental techniques to determine the phase behavior and physical properties of DME/flue gas/water/heavy oil systems. Eight constant composition expansion (CCE) tests are conducted to obtain new experimental data. A thermodynamic model is used to accurately predict saturation pressure and swelling factors, as well as the phase boundaries of N2/heavy oil systems and DME/CO2/heavy oil systems, with high accuracy.
Article
Energy & Fuels
Morteza Afkhamipour, Ebad Seifi, Arash Esmaeili, Mohammad Shamsi, Tohid N. Borhani
Summary: Non-conventional amines are being researched worldwide to overcome the limitations of traditional amines like MEA and MDEA. Adequate process and thermodynamic models are crucial for understanding the applicability and performance of these amines in CO2 absorption, but studies on process modeling for these amines are limited. This study used rate-based modeling and Deshmukh-Mather method to model CO2 absorption by DETA solution in a packed column, validated the model with experimental data, and conducted a sensitivity analysis of mass transfer correlations. The study also compared the CO2 absorption efficiency of DETA solution with an ionic solvent [bmim]-[PF6] and highlighted the importance of finding optimum operational parameters for maximum absorption efficiency.
Article
Energy & Fuels
Arastoo Abdi, Mohamad Awarke, M. Reza Malayeri, Masoud Riazi
Summary: The utilization of smart water in EOR operations has gained attention, but more research is needed to understand the complex mechanisms involved. This study investigated the interfacial tension between smart water and crude oil, considering factors such as salt, pH, asphaltene type, and aged smart water. The results revealed that the hydration of ions in smart water plays a key role in its efficacy, with acidic and basic asphaltene acting as intrinsic surfactants. The pH also influenced the interfacial tension, and the aged smart water's interaction with crude oil depended on asphaltene type, salt, and salinity.
Article
Energy & Fuels
Dongao Zhu, Kun Zhu, Lixian Xu, Haiyan Huang, Jing He, Wenshuai Zhu, Huaming Li, Wei Jiang
Summary: In this study, cobalt-based metal-organic frameworks (Co-based MOFs) were used as supports and co-catalysts to confine the NHPI catalyst, solving the leaching issue. The NHPI@Co-MOF with carboxyl groups exhibited stronger acidity and facilitated the generation of active oxygen radicals O2•, resulting in enhanced catalytic activity. This research provides valuable insights into the selection of suitable organic linkers and broadens the research horizon of MOF hybrids in efficient oxidative desulfurization (ODS) applications.
Article
Energy & Fuels
Edwin G. Hoyos, Gloria Amo-Duodu, U. Gulsum Kiral, Laura Vargas-Estrada, Raquel Lebrero, Rail Munoz
Summary: This study investigated the impact of carbon-coated zero-valent nanoparticle concentration on photosynthetic biogas upgrading. The addition of nanoparticles significantly increased microalgae productivity and enhanced nitrogen and phosphorus assimilation. The presence of nanoparticles also improved the quality of biomethane produced.
Article
Energy & Fuels
Yao Xiao, Asma Leghari, Linfeng Liu, Fangchao Yu, Ming Gao, Lu Ding, Yu Yang, Xueli Chen, Xiaoyu Yan, Fuchen Wang
Summary: Iron is added as a flocculant in wastewater treatment and the hydrothermal carbonization (HTC) of sludge produces wastewater containing Fe. This study investigates the effect of aqueous phase (AP) recycling on hydrochar properties, iron evolution and environmental assessment during HTC of sludge. The results show that AP recycling process improves the dewatering performance of hydrochar and facilitates the recovery of Fe from the liquid phase.
Article
Energy & Fuels
He Liang, Tao Wang, Zhenmin Luo, Jianliang Yu, Weizhai Yi, Fangming Cheng, Jingyu Zhao, Xingqing Yan, Jun Deng, Jihao Shi
Summary: This study investigated the influence of inhibitors (carbon dioxide, nitrogen, and heptafluoropropane) on the lower flammability limit of hydrogen and determined the critical inhibitory concentration needed for complete suppression. The impact of inhibitors on explosive characteristics was evaluated, and the inhibitory mechanism was analyzed with chemical kinetics. The results showed that with the increase of inhibitor quantity, the lower flammability limit of hydrogen also increased. The research findings can contribute to the safe utilization of hydrogen energy.
Article
Energy & Fuels
Zonghui Liu, Zhongze Zhang, Yali Zhou, Ziling Wang, Mingyang Du, Zhe Wen, Bing Yan, Qingxiang Ma, Na Liu, Bing Xue
Summary: In this study, high-performance solid catalysts based on phosphotungstic acid (HPW) supported on Zr-SBA-15 were synthesized and evaluated for the one-pot conversion of furfural (FUR) to γ-valerolactone (GVL). The catalysts were characterized using various techniques, and the ratio of HPW and Zr was found to significantly affect the selectivity of GVL. The HPW/Zr-SBA-15 (2-4-15) catalyst exhibited the highest GVL yield (83%) under optimized reaction conditions, and it was determined that a balance between Bronsted acid sites (BAS) and Lewis acid sites (LAS) was crucial for achieving higher catalytic performance. The reaction parameters and catalyst stability were also investigated.
Article
Energy & Fuels
Michael Stoehr, Stephan Ruoff, Bastian Rauch, Wolfgang Meier, Patrick Le Clercq
Summary: As part of the global energy transition, an experimental study was conducted to understand the effects of different fuel properties on droplet vaporization for various conventional and alternative fuels. The study utilized a flow channel to measure the evolution of droplet diameters over time and distance. The results revealed the temperature-dependent effects of physical properties, such as boiling point, liquid density, and enthalpy of vaporization, and showed the complex interactions of preferential vaporization and temperature-dependent influences of physical properties for multi-component fuels.
Article
Energy & Fuels
Yuan Zhuang, Ruikang Wu, Xinyan Wang, Rui Zhai, Changyong Gao
Summary: Through experimental validation and optimization of the chemical kinetic model, it was found that methanol can accelerate the oxidation reaction of ammonia, and methanol can be rapidly oxidized at high concentration. HO2 was found to generate a significant amount of OH radicals, facilitating the oxidation of methanol and ammonia. Rating: 7.5/10.
Article
Energy & Fuels
Radwan M. EL-Zohairy, Ahmed S. Attia, A. S. Huzayyin, Ahmed I. EL-Seesy
Summary: This paper presents a lab-scale experimental study on the impact of diethyl ether (DEE) as an additive to waste cooking oil biodiesel with Jet A-1 on combustion and emission features of a swirl-stabilized premixed flame. The addition of DEE to biodiesel significantly affects the flame temperature distribution and emissions. The W20D20 blend of DEE, biodiesel, and Jet A-1 shows similar flame temperature distribution to Jet A-1 and significantly reduces UHC, CO, and NOx emissions compared to Jet A-1.
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.