Investigation on methane hydrate formation in silica gel particles below the freezing point

doi:10.1039/c9ra01973a

	Investigation on methane hydrate formation in silica gel particles below the freezing point
	Liu, Jun 1,2,3,4,5; Liang, Deqing 1,2,3,4
刊名	RSC ADVANCES
	2019
卷号	9 期号:26 页码:15022-15032
ISSN号	2046-2069
DOI	10.1039/c9ra01973a
通讯作者	Liang, Deqing(liangdq@ms.giec.ac.cn)
英文摘要	Herein, methane hydrate formation in silica gel was studied in the temperature and pressure range of 253.1-268.1 K and 4.0-6.0 MPa, respectively. The stability of the hydrate and the morphology of methane hydrate formed in silica gel were analyzed by P-XRD and cryo-SEM technology. An NG(t) of 0.150 mol mol(-1) and the conversion of water to hydrate completely were realized at 253.1 K and 6 MPa. But the fastest NR120 of 52.96 mol min(-1) m(-3) and shortest T-90 of 160 min were achieved at 263.1 K and 6 MPa. The NG(t) of 0.136 and 90.93% water conversion to hydrate were realized at 263.1 K and 6 MPa. The temperature range of 263.1-268.1 K was the optimal temperature for methane hydrate formation and dissolution. From P-XRD patterns and cryo-SEM images, it was confirmed that most of the cubic ice was formed on the silica gel surface and it was metastable. All the silica gel spherical surfaces were covered with intermittent ice particles. Most of the methane hydrate was formed on the interconnection surface between silica gel particles rather than on the single silica gel spherical surface. The methane hydrate formed on the silica gel surface decomposed faster than pure water methane hydrate.
资助项目	National Key Research and Development Plan of China[2017YFC0307306] ; National Natural Science Foundation of China[41603062]
WOS关键词	PRE-COMBUSTION CAPTURE ; FIXED-BED REACTOR ; CARBON-DIOXIDE ; CLATHRATE HYDRATE ; CO2 CAPTURE ; CUBIC ICE ; STRUCTURAL TRANSITIONS ; PHASE-EQUILIBRIA ; GAS ; KINETICS
WOS研究方向	Chemistry
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000468641300052
资助机构	National Key Research and Development Plan of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/25124]
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.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China 2.CAS Key Lab Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China 3.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Guangdong, Peoples R China 4.Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Guangdong, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liu, Jun,Liang, Deqing. Investigation on methane hydrate formation in silica gel particles below the freezing point[J]. RSC ADVANCES,2019,9(26):15022-15032.
APA	Liu, Jun,&Liang, Deqing.(2019).Investigation on methane hydrate formation in silica gel particles below the freezing point.RSC ADVANCES,9(26),15022-15032.
MLA	Liu, Jun,et al."Investigation on methane hydrate formation in silica gel particles below the freezing point".RSC ADVANCES 9.26(2019):15022-15032.