Article
Chemistry, Multidisciplinary
Chuanhai Liu, Qiang Wu, Baoyong Zhang, Qiang Zhang, Qiong Wu, Yu Kang
Summary: The microfeatures of coal mine methane (CMM) hydrates were studied using Raman spectroscopy with three different gas samples. The results showed a competition between C2H6 and CH4 in terms of cavity occupancies and molecular compositions in the hydrates.
Article
Energy & Fuels
Namrata Gaikwad, Jitendra Sangwai, Praveen Linga, Rajnish Kumar
Summary: In this study, methane separation from CMM gas mixture was achieved by forming sII and sH hydrates with the use of different thermodynamic promoters at moderate temperature and pressure conditions. The formation of sII hydrate showed better methane recovery, while the formation of sH hydrate demonstrated a better separation factor. The use of water-soluble hydrate promoter sodium dodecyl sulfate (SDS) enhanced the rate of hydrate formation for better separation efficiency.
Article
Environmental Sciences
Chengmin Wei, Chengwu Li, Qiusheng Ye, Zhenfei Li, Min Hao, Shanyang Wei
Summary: In this research, a mathematical model for predicting gas emission from coalbed methane excavation workface was constructed, and a new model with higher accuracy and conciseness was proposed and validated. The study also analyzed the sensitivity of gas emission parameters and the participation ratio of gas emission sources.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Chengmin Wei, Chengwu Li, Qiusheng Ye, Zhenfei Li, Min Hao, Shanyang Wei
Summary: This research constructed a mathematical model to accurately predict the emission of coalbed methane and validated the model in the field. The study found that the new model had higher accuracy than the traditional model, leading to improved efficiency in controlling and utilizing coal mine gas disasters.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Energy & Fuels
Nikodem Szlazak, Marek Korzec, Kazimierz Piergies
Summary: In the determination of methane content in coal seams, researchers have doubts about the coal sampling procedures and the time taken from sampling to sealing the sample. Therefore, a study was conducted to evaluate the degassing of samples taken in the form of drill cuttings according to the standard procedure and cores from a coal mine roadway. The results indicate that determinations made for the cores are consistent with those made for drill cutting samples, taking into account the gas loss.
Article
Energy & Fuels
Liang Mu, Xianlong Li, Qiqi Tan, Qingyun Zhang, Qingyan Cui
Summary: CH4 separation from simulated CBG was successfully achieved using an absorption-hydration method. The hybrid separation efficiency was significantly improved compared to single absorption or hydration methods. The use of emulsions with different water droplet sizes enabled a multi-stage separation process, leading to the enrichment of CH4. This study contributes to the optimization of the CH4 separation process from CBG.
Article
Energy & Fuels
Yihan Wang, Wei Yang, Yuchen Li, Tong Liu, Guangyao Si, Liming Luo
Summary: This paper studies the changes in the microstructure of coal after immersion in different concentrations of sodium dodecyl sulfate (SDS) ion solutions, as well as the variations in contact angle and adsorption constant before and after modification. The experimental results show that SDS can modify the microstructure of coal to some extent and improve its hydrophilicity and gas adsorption capacity. These findings provide a theoretical foundation for the development and utilization of coal seam gas resources.
Article
Energy & Fuels
Qiang Zhang, Junjie Zheng, Baoyong Zhang, Praveen Linga
Summary: Coal bed methane (CBM) is currently not commercially viable in many regions due to the high concentration of non-flammable gases. Gas separation via gas hydrate using environmentally benign amino acids such as L-tryptophan and L-leucine has shown potential for improving methane recovery and separation efficiency. The combination of amino acids with tetrahydrofuran (THF) can enhance the CH4 recovery ratio and initial hydrate growth rate, providing a promising method for recovering low-concentration CBM.
Article
Engineering, Chemical
Xinxin Wang, Zujing Wang, Kangwei Wei, Hong Liu, Yihan Ling, Shaorong Wang, Fubao Zhou
Summary: This study investigated the enrichment of low-concentration coal mine gas (LC-CMG) using kinetic-separation vacuum swing adsorption (VSA) method, which showed promising results in terms of separation efficiency and safety compared to conventional equilibrium-separation PSA. The study found that the carbon molecular sieve (CMS) adsorbent had good kinetic selectivity for O-2/N-2 over CH4, although it was limited by the large equilibrium adsorption capacity of CH4. The experimental and numerical results provided insights into the product gas composition and safety performance of the enriched LC-CMG.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Environmental Sciences
Jacek Hendel, Lukasz Lukanko, Jan Macuda, Pawel Kosakowski, Krzysztof Loboziak
Summary: The study conducted in the vicinity of the decommissioned Murcki-Staszic Coal Mine in the Upper Silesian Coal Basin in Poland revealed that the decommissioned mine shafts were properly sealed and prevented mine gases from migrating into the atmosphere through the shaft. However, methane concentration in soil gases exceeded 1% at a geochemical probe located over 100 meters from the former shaft center, confirming the migration of mine gases from coal seams and/or gobs through crushed rocks into the atmosphere. The stable carbon and hydrogen isotope analysis indicated that methane in the soil atmosphere is mainly of thermogenic origin with a minor contribution of microbial component.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Byeonggwan Lee, Kyuchul Shin, Sanehiro Muromachi, Igor L. Moudrakovski, Christopher I. Ratcliffe, John A. Ripmeester
Summary: Antifreezes such as methanol and ammonia can enhance methane storage in binary clathrate hydrates like THF and TBAB. Methanol acts as a catalyst for methane hydrate formation and induces TBAB hydrates to form an orthorhombic structure suitable for methane storage. These findings suggest that methanol could play a crucial role in hydrate-based methane storage systems.
CHEMICAL ENGINEERING JOURNAL
(2021)
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.
Review
Energy & Fuels
Wancheng Zhu, Shuyuan Liu, Xiufeng Zhang, Chenhui Wei
Summary: This paper provides a comprehensive review of the mechanisms and properties of gas adsorption in coal, the geomechanical behavior of coal, and the mechanisms of gas transport in coal. It also discusses several waterless fracturing techniques for improving coalbed permeability and identifies current knowledge and research gaps.
GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
(2022)
Article
Energy & Fuels
Alejandro Bello-Palacios, Per Fotland, Geir Ersland
Summary: This study investigates the relationships between sedimentation rate, transport properties, and the formation and evolution of hydrates in fine-grained marine sediments, as well as their corresponding BSR responses. Through one-dimensional simulations, the study models the flow and transport of mass and heat through porous media during sedimentation. The results show that sedimentation affects the geothermal gradient and the stability zone of gas hydrates, leading to changes in the distribution of phases and the relocation of the base of the GHSZ over geological time.
Article
Energy & Fuels
Shuji Tamamura, Takuma Murakami, Akio Ueno, Satoshi Tamazawa, Tamotsu Kiyama, Hidenori Inomata, Hiroyuki Matsumoto, Kagemi Uchida, Yoshiaki Suzuki, Jun Aizawa, Katsuhiko Kaneko
Summary: Isotopic analysis of rocks and sedimentary rocks from the Kushiro Coal Mine in Japan reveals the presence of thermogenic methane in some closed pores.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2022)
Article
Thermodynamics
Jie Yi, Dong-Liang Zhong, Jin Yan, Yi-Yu Lu
Article
Crystallography
Zheng Li, Dong-Liang Zhong, Wei-Yan Zheng, Jin Yan, Yi-Yu Lu, Da-Tong Yi
JOURNAL OF CRYSTAL GROWTH
(2019)
Article
Energy & Fuels
Zheng Li, Christine C. Holzammer, Andreas S. Braeuer
Article
Thermodynamics
Yi-Yu Lu, Bin-Bin Ge, Dong-Liang Zhong
Article
Energy & Fuels
Jian-Bo Li, Dong-Liang Zhong, Jin Yan
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2020)
Review
Energy & Fuels
Xi-Yue Li, Bin-Bin Ge, Jin Yan, Yi-Yu Lu, Dong-Liang Zhong, Peter Englezos, Bao-Yong Zhang
Summary: The consumption of natural gas is vital for optimizing China's energy structure towards reduced CO2 emissions. Coalbed methane is recognized as a significant energy resource to supplement conventional fossil fuels. The hydrate-based gas separation technology has shown promise for purifying low-concentration coalbed methane, but challenges remain in achieving milder pressure conditions and enhancing hydrate formation rates. Further research is needed to bridge the gap between gas separation science and technology.
Article
Energy & Fuels
Xiao-Yan Deng, Ying Yang, Dong-Liang Zhong, Xi-Yue Li, Bin-Bin Ge, Jin Yan
Summary: This study investigates the morphology and kinetics of CO2 hydrate formation in the presence of sodium dodecyl sulfate (SDS). It was found that the growth of CO2 hydrate above the gas-liquid interface became stronger with higher SDS concentration, indicating an enhanced promoting effect of SDS on CO2 hydrate formation. The highest efficiency for CO2 hydrate formation was achieved at 1500 and 3000 ppm of SDS, showing potential for improving hydrate-based CO2 capture technology in the future.
Article
Thermodynamics
Feng-Mei Xie, Xi-Yue Li, Dong-Liang Zhong, Peter Englezos, Guo-Xiang Lu
Summary: This study demonstrates the phase behavior of TBPB and CO2 hydrates at different concentrations, with the addition of surfactant affecting phase equilibrium and CO2 consumption during formation. Further research should focus on increasing the CO2 storage capacity of TBPB semiclathrate hydrate.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2021)
Article
Engineering, Chemical
Wen-Xin Dai, Xi-Yue Li, Dong-Liang Zhong, Jin Yan, Kai Dong, Xiao-Yan Deng
Summary: This study investigates the use of a fixed bed of activated carbons to capture CO2 at hydrate formation conditions. The results show that an adsorption-hydration hybrid process in wet activated carbons outperforms single adsorption process in dry activated carbons for CO2 capture. The optimal water saturation value for gas consumption is found to be 40%.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Energy & Fuels
Liang-Meng Wu, Xi-Yue Li, Feng-Mei Xie, Dong-Liang Zhong, Peter Englezos, Jin Yan
Summary: This study presents a review of kinetic studies on the enhancement of hydrate-based CO2 capture using additives, porous media, nanofluids, etc. Future research directions are also discussed. The aim of this review is to aid understanding of the mechanism of the hydrate-based CO2 capture process and provide references for its industrial applications in the near future.
Article
Engineering, Chemical
Bin-Bin Ge, Jin Yan, Dong-Liang Zhong, Yi-Yu Lu, Xi-Yue Li
Summary: CO2 capture was experimentally investigated by forming TBAB semiclathrate in a new system of TBAB + graphite nanofluids. The system of TBAB + graphite nanofluids showed preference for CO2 capture compared to TBAB solution and TBAB + SDS solution. The optimal concentration of 0.2 wt.% graphite nanoparticles was found to enhance hydrate growth in TBAB + graphite nanofluids.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Energy & Fuels
Kai Dong, Wen-Xin Dai, Dong-Liang Zhong, Jin Yan, Feng-Mei Xie, Han-Sen Sun, Man Wang
Summary: This study investigates the effects of the surfactant cocamidopropyl betaine (CAB) on coal structures and CH4 adsorption characteristics. The results show that the hydrophilicity of coal samples is enhanced after being treated with CAB solutions, increasing the number of hydroxyl functional groups and reducing the amount of adsorbed CH4. Additionally, the pore volume of coal samples increases and the CBM migration rate improves. A concentration of 0.008 mol/L CAB is determined to be the optimal concentration for increasing CBM extraction efficiency.
Article
Engineering, Chemical
Xi-Yue Li, Jin Yan, Dong-Liang Zhong, Shi-Jian Lu, Bin-Bin Ge
Summary: This study investigated the formation of tetra-n-butyl ammonium bromide (TBAB) semiclathrate hydrate for CO2 capture through experiments and in situ Raman spectroscopy. The impacts of TBAB concentration and operating temperature on CO2 incorporation into TBAB semiclathrates were analyzed. The results showed that the structure transition of TBAB semiclathrates from type A to type B occurred in the presence of CO2, resulting in increased CO2 consumption. The TBAB semiclathrate formed at 2.57 mol % TBAB and 282.15 K was found to be a suitable system for CO2 capture.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Energy & Fuels
Bin-Bin Ge, Dong-Liang Zhong, Yi-Yu Lu, Xi-Yue Li
Summary: The effect of THF concentration on the formation of THF-CH4 hydrate was investigated. It was found that THF concentration is a key factor affecting the growth of hydrates, and increasing THF concentration improves mass transfer. In situ Raman spectroscopy observation showed that CH4 and THF molecules occupy the small and large cavities of the sII hydrate, respectively. Forming two types of hydrates at a low concentration can increase gas storage capacity.
Proceedings Paper
Energy & Fuels
Bin-Bin Ge, Dong-Liang Zhong, Yi-Yu Lu
INNOVATIVE SOLUTIONS FOR ENERGY TRANSITIONS
(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.