Article
Polymer Science
Andrey Stoporev, Rail Kadyrov, Tatyana Adamova, Evgeny Statsenko, Thanh Hung Nguyen, Murtazali Yarakhmedov, Anton Semenov, Andrey Manakov
Summary: Polymeric models prepared with a 3D printer were used to study methane hydrate formation. Different plastics were tested, and their porosity volumes were analyzed using X-ray tomography. The type of polymer used was found to have a significant impact on enhancing hydrate formation.
Article
Chemistry, Multidisciplinary
Saphir Venet, Daniel Broseta, Ross Brown
Summary: Video microscopy reveals a novel morphology and growth process of gas hydrate, promoted by a porous activated carbon substrate at a guest-host interface. The growth of hollow cyclopentane hydrate fibers is continuously fed by the flow of the guest through the substrate, even pushing the substrate away from the interface. The growth is limited by the size of the setup, overcoming the gas hydrate mass-transfer bottleneck and forming a thin impervious hydrate crust between the two phases in quiescent systems.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Energy & Fuels
Xingxun Li, Cunning Wang, Qingping Li, Qi Fan, Guangjin Chen, Changyu Sun
Summary: In this study, the growth behavior of methane hydrate film on pore interior surfaces was directly visualized and studied using a transparent high-pressure glass microfluidic chip with a porous structure. The results showed that the thickening growth process of the film is mainly determined by water molecule diffusion in the confined pores.
Article
Chemistry, Multidisciplinary
Stian Almenningen, Maksim Lysyy, Geir Ersland
Summary: This study investigated the growth pattern and rate of CH4 hydrate in sandstone pores using a high-pressure micromodel. CH4 hydrate predominantly formed and grew along the gas-water interface, with different growth rates identified in different directions. The results can be used as input for numerical models simulating pore-scale CH4 hydrate growth behavior.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Engineering, Chemical
Xin Jiang, Baojiang Sun, Zhiyuan Wang, Wantian Zhou, Jiakai Ji, Litao Chen
Summary: The growth of hydrate crystals on the surface of methane bubble in pure water was studied using a high-pressure visible microscope. It was found that the hydrate film is porous and the crystal morphology and growth rate are affected by subcooling and methane concentration difference.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Xiluo Hao, Chengfeng Li, Qingguo Meng, Jianye Sun, Li Huang, Qingtao Bu, Congying Li
Summary: The three-phase coexistence line of CO2 hydrate was determined using molecular dynamics simulations. The influence of the water model on the equilibrium prediction was found to be greater than that of the CO2 model. Adjusting the parameters based on the solubility of CO2 in water improved the accuracy of the simulations.
Article
Chemistry, Multidisciplinary
Liwen Li, Xiao Wang, Youguo Yan, Joseph S. Francisco, Jun Zhang, Xiao Cheng Zeng, Jie Zhong
Summary: This study investigates the nucleation process of natural gas hydrates at different degrees of supercooling using molecular dynamics simulations. The concept of a transition layer is proposed to explain the distinct nucleation phenomena observed at different supercoolings.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Energy & Fuels
Jyoti Shanker Pandey, Stian Almenningen, Nicolas von Solms, Geir Ersland
Summary: The study investigates the effectiveness of combined pressure depletion and thermal stimulation to produce CH4 gas from CH4 gas hydrates under permafrost conditions. It was found that the rate of CH4 gas production is affected by hydrate saturation and initial distribution, and that thermal stimulation can enhance gas production by melting metastable hydrate and surrounding ice cover. These results provide important insights into understanding and predicting the impact of global warming on the dissociation of permafrost-affected gas hydrates.
Article
Energy & Fuels
Zhiyuan Wang, Pengfei Li, Shikun Tong, Jianbo Zhang, Chenru Zhou, Jihao Pei, Hemin Yang, Chenwei Liu
Summary: In this study, a high-pressure visualization microscopic force testing system was used to investigate the adhesion force between methane hydrate particles and wall droplets. The results showed that the adhesion force reached the lowest value at a QAs1 solution concentration of 0.2 wt% (CMC), with values of 589.81 mN/m and 1123.63 mN/m under 1 and 10 subcooling conditions, respectively. The mechanism of QAs1 in reducing adhesion force was found to be mainly through the reduction of gas-water interfacial tension under lower subcooling conditions and the steric hindrance effect of QAs1 molecules under higher subcooling conditions.
Article
Energy & Fuels
Thi Xiu Le, Michel Bornert, Ross Brown, Patrick Aimedieu, Daniel Broseta, Baptiste Chabot, Andrew King, Anh Minh Tang
Summary: This study used high-resolution optical microscopy and synchrotron X-ray computed tomography to observe methane hydrate growth in marine sandy sediments, revealing previously unidentified features such as hollow filaments and Haines jumps. These techniques allowed for detailed observations at spatial scales below the pore size and temporal scales below 1 s, providing valuable insights into the growth processes of methane hydrate.
Article
Geochemistry & Geophysics
Kehua You, Lori Summa, Peter Flemings, Manasij Santra, Yi Fang
Summary: The systematic model presented in this study links the generation, migration, phase partitioning, and accumulation of methane into a closed loop mechanism, controlled by the deposition of coarse-grained layers and the base of hydrate stability zone during sediment burial. This model helps to explore for high-concentration methane hydrate in geological systems and is important for understanding the methane budget and carbon cycle under the seafloor. The coupling of geological evolution, microbial methane generation, and gas flow by buoyancy results in concentrated hydrate deposits at structural closures, illustrating how these factors contribute to the generation of high-concentration methane hydrate.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Chemistry, Multidisciplinary
Muhammad A. Kamel, Aleksei S. Lobasov, Surya Narayan, Konstantin S. Pervunin, Christos N. Markides
Summary: This study investigates the growth mechanism and process of hydrate formation by observing the process on a water drop immersed in liquid cyclopentane. The study reveals that the morphology of hydrate film changes with the subcooling temperature, and the growth rate of hydrate varies with the degree of subcooling.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Energy & Fuels
Ankur Singh, Ajay Suri, Divyansh Chandravanshi
Summary: To ensure the smooth operation of the oil and gas industry, it is crucial to prevent hydrate blockages in pipelines. Synthetic kinetic hydrate inhibitors (KHIs) are commonly used, but they pose disposal concerns due to poor biodegradability. This study investigates the use of a natural and biodegradable polysaccharide, lambda carrageenan, as a standalone KHI and in combination with biodegradable solvents and commercial KHI polymers. The results show that lambda carrageenan exhibits hydrate inhibition performance comparable to commercial KHIs when used alone or in combination with solvents or polymers.
Article
Energy & Fuels
Yanhong Wang, Xin Li, Shuanshi Fan, Shenglong Wang, Xuemei Lang, Chi Yu
Summary: The study observed the growth of cyclopentane (CP) hydrate crystals at interfaces of water-CP, water-silica-CP, and water-kaolin-CP, and investigated the effect of water salinity on CP hydrate crystal growth in silica sand and kaolin. The addition of sediments increased the growth of hydrate crystals, with a faster growth rate in silica sand compared to kaolin. The presence of NaCl in the water phase slowed down the growth rate of hydrate crystals and resulted in a rougher crystal surface.
Article
Engineering, Environmental
Yang Liu, Cong Chen, Wenfeng Hu, Weizhong Li, Bo Dong, Yan Qin
Summary: This study investigates methane hydrate growth with impingement using molecular dynamics simulation, revealing unique features like dislocation, two-occupied hydrate cages, and fast methane diffusion. The findings show that methane molecules can hop between different hydrate cages and exhibit a faster diffusion rate when gas bubbles are present.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Chemical
Sheng-Li Li, Yun-Fei Wang, Chang-Yu Sun, Guang-Jin Chen, Bei Liu, Zhi-Yun Li, Qing-Lan Ma
CHEMICAL ENGINEERING SCIENCE
(2015)
Article
Energy & Fuels
Youhong Sun, Guobiao Zhang, Wei Guo, Bing Li, Shengli Li, Kai Su, Rui Jia
ENERGY EXPLORATION & EXPLOITATION
(2015)
Article
Energy & Fuels
You-Hong Sun, Kai Su, Sheng-Li Li, John J. Carroll, You-Hai Zhu
Article
Engineering, Chemical
You-Hong Sun, Sheng-Li Li, Guo-Biao Zhang, Wei Guo, You-Hai Zhu
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2017)
Article
Energy & Fuels
Sheng-Li Li, You-Hong Sun, Kai Su, Wei Guo, You-Hai Zhu
ENERGY EXPLORATION & EXPLOITATION
(2018)
Article
Engineering, Chemical
Sheng-Li Li, Chang-Yu Sun, Guang-Jin Chen, Zhi-Yun Li, Qing-Lan Ma, Lan-Ying Yang, Amadeu K. Sum
CHEMICAL ENGINEERING SCIENCE
(2014)
Review
Engineering, Chemical
Youhong Sun, Shuhui Jiang, Shengli Li, Guobiao Zhang, Wei Guo
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2019)
Article
Engineering, Environmental
Youhong Sun, Guobiao Zhang, Shengli Li, Shuhui Jiang
CHEMICAL ENGINEERING JOURNAL
(2019)
Article
Chemistry, Applied
Shijie Kang, Youhong Sun, Sunhua Deng, Shengli Li, Yuze Su, Wei Guo, Jiasheng Li
Summary: The combination of subcritical water and catalyst, specifically FeCl2, was proposed for oil shale extraction, resulting in a significant increase in bitumen yield and a reduction in extraction time. FeCl2 played a crucial role in promoting cleavage of hetero-atomic bonds in kerogen and transportation of bitumen in the shale matrix, making it an efficient method for in situ extraction of oil shale.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Engineering, Environmental
Youhong Sun, Shuhui Jiang, Shengli Li, Xiaochu Wang, Saiyu Peng
Summary: This study experimentally investigated the formation of CO2 hydrate from clay bound water, revealing a transition from adsorption to hydrate formation with increasing water content. The process was influenced by pressure and mineral type, with hydrate formation starting below 15% water content.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Energy & Fuels
Xiaolong Ma, Jinhua Cheng, Youhong Sun, Shengli Li
Summary: This study investigates the effects of reservoir properties and fracturing execution parameters on hydraulic fracturing of natural gas hydrate (NGH) reservoirs using a 2D numerical model. The results indicate that fracture initiation pressure is influenced by gas hydrate saturation, reservoir intrinsic permeability, and in situ horizontal stress, while a higher injection rate of fracturing fluid leads to wider and longer fractures. These findings contribute to a better understanding of hydraulic fracturing in NGH reservoirs and the development of potential reservoir stimulation strategies.
Article
Engineering, Environmental
Shengli Li, Guobiao Zhang, Zhenxue Dai, Shuhui Jiang, Youhong Sun
Summary: Research suggests that at relatively high temperatures, CO2-N-2 replacement leads to more pronounced methane production in gas hydrate reservoirs. This finding provides new insights for improving gas recovery efficiency and safety in the application of CO2 replacement method.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Thermodynamics
Shijie Kang, Youhong Sun, Mingyang Qiao, Shengli Li, Sunhua Deng, Wei Guo, Jiasheng Li, Wentong He
Summary: Experimental results demonstrate that FeCl3 has a promoting effect on the extraction of bulk Huadian oil shale under subcritical water conditions, enhancing oil yield and reducing the time required for maximum oil production. FeCl3 facilitates kerogen pyrolysis reaction networks and accelerates the decomposition of residual bitumen, improving the extraction process of shale oil. Additionally, FeCl3 affects the chemical reactions of residual kerogen and shale matrix.
Article
Energy & Fuels
Xiaolong Ma, Youhong Sun, Baochang Liu, Wei Guo, Rui Jia, Bing Li, Shengli Li
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2020)
Article
Engineering, Chemical
Xin-Yang Zeng, Jin-Rong Zhong, Yi-Fei Sun, Sheng-Li Li, Guang-Jin Chen, Chang-Yu Sun
CHEMICAL ENGINEERING SCIENCE
(2017)