The optimization mechanism for gas hydrate dissociation by depressurization in the sediment with different water saturations and different particle sizes

doi:10.1016/j.energy.2020.119129

GIEC OpenIR

	The optimization mechanism for gas hydrate dissociation by depressurization in the sediment with different water saturations and different particle sizes
	Li, Xiao-Yan 1,2,3,4,5; Li, Xiao-Sen1,2,3,4 ; Wang, Yi 1,2,3,4; Liu, Jian-Wu 1,2,3,4; Hu, Heng-Qi 1,2,3,4,6
	2021-01-15
发表期刊	ENERGY
ISSN	0360-5442
卷号	215 页码:11
通讯作者	Li, Xiao-Sen(lixs@ms.giec.ac.cn) ; Wang, Yi(wangyi@ms.giec.ac.cn)
摘要	Gas hydrate is considered as a new promising energy resource, and it is extensively distributed in offshore sediments and permafrost region. Two important factors affecting the gas hydrate dissociation are the water saturation in the sediments and the particle size of the sediments. In this study, the influences of the water saturation on the hydrate dissociation by depressurization in the sediments with different particle sizes were analyzed. It was found that there could be an optimum water saturation (Sw,op), at which the hydrate dissociation rate reached to the maximum value. When the water saturation (Sw) was smaller than Sw,op, the hydrate dissociation was mainly limited by the heat transfer rate of the sediments, and the hydrate dissociation rate increased with the increase of the water saturation. When the water saturation (Sw) was larger than Sw,op, the hydrate dissociation rate was limited by the mass transport rate of the gas released from the hydrate dissociation, and the hydrate dissociation rate decreased with the increase of the water saturation. The experimental results showed that for the sediments with the particle size of 40-60 mesh, the optimum water saturation is smaller than 0.042. For the sediments with the particle size of 325-400 mesh, the optimum water saturation is larger than 0.415. For the sediments with the particle size of 105-125 mesh, the optimum water saturation is closed to 0.413. Therefore, the optimum water saturation for hydrate dissociation increased with the decrease of the particle size of the sediments, and it was inferred that the optimum water saturation was related to the irreducible water saturation of the sediments. It was a new knowledge about the influence of the water saturation on the hydrate dissociation in the sediments with different particle sizes, and it could provide some guidance for the production method of gas hydrate in different types of hydrate reservoirs. (c) 2020 Elsevier Ltd. All rights reserved.
关键词	Gas hydrate Depressurization Optimum water saturation Particle size Heat transfer Mass transport
DOI	10.1016/j.energy.2020.119129
关键词[WOS]	HEAT-TRANSFER CHARACTERISTICS ; METHANE-HYDRATE ; PRODUCTION BEHAVIOR ; INJECTION
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51736009] ; National Natural Science Foundation of China[51676190] ; National Natural Science Foundation of China[51806251] ; Guangdong Special Support Program-Local innovation and entrepreneurship team project[2019BT02L278] ; Special Project for Marine Economy Development of Guangdong Province[GDME-2018D002] ; 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] ; Youth Science and Technology Innovation Talent of Guangdong[2016TQ03Z862] ; Youth Innovation Promotion Association CAS[2018382]
WOS研究方向	Thermodynamics ; Energy & Fuels
项目资助者	National Natural Science Foundation of China ; Guangdong Special Support Program-Local innovation and entrepreneurship team project ; Special Project for Marine Economy Development of Guangdong Province ; Science and Technology Apparatus Development Program of the Chinese Academy of Sciences ; Frontier Sciences Key Research Program of the Chinese Academy of Sciences ; Youth Science and Technology Innovation Talent of Guangdong ; Youth Innovation Promotion Association CAS
WOS类目	Thermodynamics ; Energy & Fuels
WOS记录号	WOS:000596171000002
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：32[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/344007/32401
专题	中国科学院广州能源研究所
通讯作者	Li, Xiao-Sen; Wang, Yi
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Gas Hydrate, Guangzhou 510640, Peoples R China 3.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China 4.Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 6.Univ Sci & Technol China, Hefei 230000, 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	Li, Xiao-Yan,Li, Xiao-Sen,Wang, Yi,et al. The optimization mechanism for gas hydrate dissociation by depressurization in the sediment with different water saturations and different particle sizes[J]. ENERGY,2021,215:11.
APA	Li, Xiao-Yan,Li, Xiao-Sen,Wang, Yi,Liu, Jian-Wu,&Hu, Heng-Qi.(2021).The optimization mechanism for gas hydrate dissociation by depressurization in the sediment with different water saturations and different particle sizes.ENERGY,215,11.
MLA	Li, Xiao-Yan,et al."The optimization mechanism for gas hydrate dissociation by depressurization in the sediment with different water saturations and different particle sizes".ENERGY 215(2021):11.