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Research on micro-mechanism and efficiency of CH4 exploitation via CH4-CO2 replacement from natural gas hydrates

文献类型：期刊论文

作者Xu, Chun-Gang1,3,4; Cai, Jing1,2,3,4; Yu, Yi-Song1,2,3,4; Chen, Zhao-Yang1,3,4; Li, Xiao-Sen1,3,4
刊名FUEL
出版日期2018-03-15
卷号216页码:255-265
关键词CH4 exploitation CH4-CO2 replacement Natural gas hydrate (NGH) In situ Raman FTIR
ISSN号0016-2361
DOI10.1016/j.fuel.2017.12.022
通讯作者Li, Xiao-Sen(lixs@ms.giec.ac.cn)
英文摘要The research on the micro-mechanism and efficiency of CH4-CO2 replacement from natural gas hydrates are investigated in this work by a series of experiments with pure CO2, CO2/N-2, CO2/H-2 and CO2/He gas mixtures under 4.5 MPa and 274.0 K. In situ Raman and FTIR are employed to determine the micro structures and components of the hydrates. The results indicate the small gas molecules help to increase the rate of CH4-CO2 replacement, and adding H-2 or N-2 into the system has great effect on enhancing the CH4 exploitation efficiency as H-2 or N-2 molecules can weaken the van der Waals forces between CH4 molecule and hydrate crystal cave and further lead to the deformation of the hydrate cavities in the process. The Raman spectra illustrate no hydrate structure change exists in the replacement process, and the FTIR spectra illustrate the replacement can happen in both large and small cavities. The mechanism of CH4-CO2 replacement in the hydrate can be descripted as the introduction of CO2 breaks the balance of two phases of CH4 and CH4 hydrate, resulting in the deformation or dissociation of the CH4 hydrate, and finally forming CO2 hydrates with free water by the hydrate structure reconstitution.
WOS关键词DIOXIDE CLATHRATE HYDRATE ; CARBON-DIOXIDE ; LIQUID CO2 ; METHANE RECOVERY ; PRESSURIZED CO2 ; KINETICS ; EQUILIBRIA ; PHASE ; WATER ; SYSTEM
资助项目National Natural Science Fund[51376184] ; Key Program of National Natural Science Foundation of China[51736009] ; International S&T Cooperation Program of China[2015DFA61790] ; Science and Technology Apparatus Development Program of the Chinese Academy of Sciences[YZ201619] ; Frontier Sciences Key Research Program of the Chinese Academy of Sciences[QYZDJ-SSW-JSC033]
WOS研究方向Energy & Fuels ; Engineering
语种英语
WOS记录号WOS:000427818100027
出版者ELSEVIER SCI LTD
资助机构National Natural Science Fund ; Key Program of National Natural Science Foundation of China ; International S&T Cooperation Program of China ; Science and Technology Apparatus Development Program of the Chinese Academy of Sciences ; Frontier Sciences Key Research Program of the Chinese Academy of Sciences
源URL[http://ir.giec.ac.cn/handle/344007/23156]  
专题中国科学院广州能源研究所
通讯作者Li, Xiao-Sen
作者单位1.Guangdong Key Lab New & Renewable Energy Res & De, Guangzhou 510640, Guangdong, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100083, Peoples R China
3.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Gas Hydrate, Guangzhou 510641, Guangdong, Peoples R China
4.Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Guangdong, Peoples R China
推荐引用方式
GB/T 7714		 Xu, Chun-Gang,Cai, Jing,Yu, Yi-Song,et al. Research on micro-mechanism and efficiency of CH4 exploitation via CH4-CO2 replacement from natural gas hydrates[J]. FUEL,2018,216:255-265.
APA Xu, Chun-Gang,Cai, Jing,Yu, Yi-Song,Chen, Zhao-Yang,&Li, Xiao-Sen.(2018).Research on micro-mechanism and efficiency of CH4 exploitation via CH4-CO2 replacement from natural gas hydrates.FUEL,216,255-265.
MLA Xu, Chun-Gang,et al."Research on micro-mechanism and efficiency of CH4 exploitation via CH4-CO2 replacement from natural gas hydrates".FUEL 216(2018):255-265.

入库方式： OAI收割

来源：广州能源研究所

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