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

doi:10.1016/j.fuel.2017.12.022

GIEC OpenIR

	Research on micro-mechanism and efficiency of CH4 exploitation via CH4-CO2 replacement from natural gas hydrates
	Xu, Chun-Gang 1,2,3; Cai, Jing 1,2,3,4; Yu, Yi-Song 1,2,3,4; Chen, Zhao-Yang 1,2,3; Li, Xiao-Sen1,2,3
	2018-03-15
发表期刊	FUEL
ISSN	0016-2361
卷号	216 页码:255-265
通讯作者	Li, Xiao-Sen(lixs@ms.giec.ac.cn)
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.
关键词	CH4 exploitation CH4-CO2 replacement Natural gas hydrate (NGH) In situ Raman FTIR
DOI	10.1016/j.fuel.2017.12.022
关键词[WOS]	DIOXIDE CLATHRATE HYDRATE ; CARBON-DIOXIDE ; LIQUID CO2 ; METHANE RECOVERY ; PRESSURIZED CO2 ; KINETICS ; EQUILIBRIA ; PHASE ; WATER ; SYSTEM
收录类别	SCI
语种	英语
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
项目资助者	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
WOS类目	Energy & Fuels ; Engineering, Chemical
WOS记录号	WOS:000427818100027
出版者	ELSEVIER SCI LTD
引用统计	被引频次：52[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/23157
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.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Gas Hydrate, Guangzhou 510641, Guangdong, Peoples R China 2.Guangdong Key Lab New & Renewable Energy Res & De, Guangzhou 510640, Guangdong, Peoples R China 3.Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Guangdong, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100083, Peoples R China
第一作者单位	中国科学院广州能源研究所
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.