Decomposition Characterizations of Methane Hydrate Confined inside Nanoscale Pores of Silica Gel below 273.15 K

doi:10.3390/cryst9040200

GIEC OpenIR

	Decomposition Characterizations of Methane Hydrate Confined inside Nanoscale Pores of Silica Gel below 273.15 K
	Wan, Lihua; Zhou, Xuebing; Chen, Peili; Zang, Xiaoya; Liang, Deqing; Guan, Jinan
	2019-04-01
发表期刊	CRYSTALS
ISSN	2073-4352
卷号	9 期号:4 页码:17
通讯作者	Wan, Lihua(wanlh@ms.giec.ac.cn)
摘要	The formation and decomposition of gas hydrates in nanoscale sediments can simulate the accumulation and mining process of hydrates. This paper investigates the Raman spectra of water confined inside the nanoscale pores of silica gel, the decomposition characterizations of methane hydrate that formed from the pore water, and the intrinsic relationship between them. The results show that pore water has stronger hydrogen bonds between the pore water molecules at both 293 K and 223 K. The structure of pore water is conducive to the nucleation of gas hydrate. Below 273.15 K, the decomposition of methane hydrate formed from pore water was investigated at atmospheric pressure and at a constant volume vessel. We show that the decomposition of methane hydrate is accompanied by a reformation of the hydrate phase: The lower the decomposition temperature, the more times the reformation behavior occurs. The higher pre-decomposition pressure that the silica gel is under before decomposition is more favorable to reformation. Thus, reformation is the main factor in methane hydrate decomposition in nanoscale pores below 273.15 K and is attributed to the structure of pore water. Our results provide experimental data for exploring the control mechanism of hydrate accumulation and mining.
关键词	gas hydrate decomposition reformation pre-decomposition pressure nanoscale pores
DOI	10.3390/cryst9040200
关键词[WOS]	GAS HYDRATE ; PHASE-EQUILIBRIA ; STABILITY ZONE ; CARBON-DIOXIDE ; POROUS-MEDIA ; X-RAY ; THERMODYNAMIC PROPERTIES ; SELF-PRESERVATION ; DISSOCIATION ; WATER
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China (NSFC)[51576197] ; National Natural Science Foundation of China (NSFC)[51106163] ; National Natural Science Foundation of China (NSFC)[51706230] ; National Natural Science Foundation of China (NSFC)[51676197] ; National Key Research and Development Plan of China[2016YFC0304002] ; NSFC from the Government of Guangdong Province[U0933004]
WOS研究方向	Crystallography ; Materials Science
项目资助者	National Natural Science Foundation of China (NSFC) ; National Key Research and Development Plan of China ; NSFC from the Government of Guangdong Province
WOS类目	Crystallography ; Materials Science, Multidisciplinary
WOS记录号	WOS:000467300100020
出版者	MDPI
引用统计	被引频次：10[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/344007/24949
专题	中国科学院广州能源研究所
通讯作者	Wan, Lihua
作者单位	Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Gas Hydrate, Guangzhou 510640, Guangdong, 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	Wan, Lihua,Zhou, Xuebing,Chen, Peili,et al. Decomposition Characterizations of Methane Hydrate Confined inside Nanoscale Pores of Silica Gel below 273.15 K[J]. CRYSTALS,2019,9(4):17.
APA	Wan, Lihua,Zhou, Xuebing,Chen, Peili,Zang, Xiaoya,Liang, Deqing,&Guan, Jinan.(2019).Decomposition Characterizations of Methane Hydrate Confined inside Nanoscale Pores of Silica Gel below 273.15 K.CRYSTALS,9(4),17.
MLA	Wan, Lihua,et al."Decomposition Characterizations of Methane Hydrate Confined inside Nanoscale Pores of Silica Gel below 273.15 K".CRYSTALS 9.4(2019):17.