Investigation of the hydrate formation process in fine sediments by a binary CO2/N-2 gas mixture

doi:10.1016/j.cjche.2019.02.032

	Investigation of the hydrate formation process in fine sediments by a binary CO2/N-2 gas mixture
	Zang, Xiaoya ; Wan, Lihua ; Liang, Deqing 1
刊名	CHINESE JOURNAL OF CHEMICAL ENGINEERING
	2019-09-01
卷号	27 期号:9 页码:2157-2163
关键词	Gas hydrate Formation Sediments CO2/N-2 mixture
ISSN号	1004-9541
DOI	10.1016/j.cjche.2019.02.032
通讯作者	Liang, Deqing(liangdq@ms.giec.ac.cn)
英文摘要	To obtain the fundamental data of CO2/N-2 gas mixture hydrate formation kinetics and CO2 separation and sequestration mechanisms, the gas hydrate formation process by a binary CO2/N-2 gas mixture (50:50) in fine sediments (150-250 mu m) was investigated in a semibatch vessel at variable temperatures(273, 275, and 277 K)and pressures (5.8-7.8 MPa). During the gas hydrate reaction process, the changes in the gaseous phase composition were determined by gas chromatography. The results indicate that the gas hydrate formation process of the binary CO2/N-2 gas mixture in fine sediments can be reduced to two stages. Firstly, the dissolved gas containing a large amount of CO2 formed gas hydrates, and then gaseous N-2 participated in the gas hydrate formation. In the second stage, all the dissolved gas was consumed. Thus, both gaseous CO2 and N-2 diffused into sediment. The first stage in different experiments lasted for 5-15 h, and >60% of the gas was consumed in this period. The gas consumption rate was greater in the first stage than in the second stage. After the completion of gas hydrate formation, the CO2 content in the gas hydrate was more than that in the gas phase. This indicates that CO2 formed hydrate easily than N-2 in the binary mixture. Higher operating pressures and lower temperatures increased the gas consumption rate of the binary gas mixture in gas hydrate formation. (C) 2019 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights reserved.
资助项目	National Key Research and Development Plan of China[2017YFC0307306] ; National Natural Science Foundation of China[51676197] ; National Natural Science Foundation of China[51576197] ; CAS Program[KGZD-EW-301] ; Guangzhou Science and Technology Project[201804010411] ; Youth Innovation Promotion Association CAS
WOS关键词	CARBON-DIOXIDE ; POROUS-MEDIA ; FLUE-GAS ; CO2 SEQUESTRATION ; METHANE ; RECOVERY ; STORAGE ; DECOMPOSITION ; REPLACEMENT ; SOLUBILITY
WOS研究方向	Engineering
语种	英语
出版者	CHEMICAL INDUSTRY PRESS CO LTD
WOS记录号	WOS:000498863100017
资助机构	National Key Research and Development Plan of China ; National Natural Science Foundation of China ; CAS Program ; Guangzhou Science and Technology Project ; Youth Innovation Promotion Association CAS
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/25916]
专题	中国科学院广州能源研究所
通讯作者	Liang, Deqing
作者单位	1.CAS Key Lab Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China 2.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Guangdong, Peoples R China 3.Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Zang, Xiaoya,Wan, Lihua,Liang, Deqing. Investigation of the hydrate formation process in fine sediments by a binary CO2/N-2 gas mixture[J]. CHINESE JOURNAL OF CHEMICAL ENGINEERING,2019,27(9):2157-2163.
APA	Zang, Xiaoya,Wan, Lihua,&Liang, Deqing.(2019).Investigation of the hydrate formation process in fine sediments by a binary CO2/N-2 gas mixture.CHINESE JOURNAL OF CHEMICAL ENGINEERING,27(9),2157-2163.
MLA	Zang, Xiaoya,et al."Investigation of the hydrate formation process in fine sediments by a binary CO2/N-2 gas mixture".CHINESE JOURNAL OF CHEMICAL ENGINEERING 27.9(2019):2157-2163.