Raman Spectroscopic Characteristics of Natural Gas Hydrate Recovered from Shenhu Area in South China Sea and Qilian Mountain Permafrost

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	Raman Spectroscopic Characteristics of Natural Gas Hydrate Recovered from Shenhu Area in South China Sea and Qilian Mountain Permafrost
	Liu, CL (Liu Changling); Ye, YG (Ye Yuguang); Meng, QG (Meng Qingguo); Lu, ZQ (Lu Zhenquan); Zhu, YH (Zhu Youhai); Liu, JA (Liu Jian); Yang, SX (Yang Shengxiong)
刊名	ACTA CHIMICA SINICA
	2010
卷号	68 期号:18 页码:1881-1886
关键词	gas hydrate laser micro-Raman spectrometry Shenhu Area qilian Mountain permafrost
ISSN号	0567-7351
英文摘要	Natural gas hydrate samples were firstly recovered from Shenhu Area of South China Sea (SH-GH) and Qilian mountain permafrost (QLM-GH) in China. In this paper, laser micro-Raman spectroscopy was used to investigate the two kinds of samples to reveal the structural characteristics and the gas composition of these natural gas hydrates. The results show that SH-GH is typically structure I (sI) hydrate. Methane gas is a dominant component which accounts for more than 99% of all the guest gas. The cage occupancy of methane is larger than 99% for large cages while 86% for small cages, with the hydration number of approximately 5.99 by Raman method. In comparison, QLM-GH is formed by relatively complicated gas components. Except for methane (about 70%), there are also considerable amounts of ethane, propane and butane. It is presumed preliminarily that GH-QLM is structure II (sII) hydrate based on its Raman spectrum, with the cage occupancy ratio of methane for small to large cage (theta(S)/theta(L)) of 26.38, which is much larger than that of GH-SH (0.87). This is mainly because the lager molecules (i.e. ethane, propane and butane) in QLM-GH preferentially occupy the large cages and thus greatly diminish methane molecules in large cages.
学科主题	岩矿鉴定与测试
WOS关键词	CAGE OCCUPANCY ; SINGLE-CRYSTAL ; CLATHRATE ; METHANE ; TEMPERATURE ; SPECTRA ; SYSTEM ; NUMBER
WOS研究方向	Chemistry
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000283483200016
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39097]
专题	中国地质调查局
作者单位	Guangzhou Marine Geol Survey, Guangzhou 510760, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Liu, CL ,Ye, YG ,Meng, QG ,et al. Raman Spectroscopic Characteristics of Natural Gas Hydrate Recovered from Shenhu Area in South China Sea and Qilian Mountain Permafrost[J]. ACTA CHIMICA SINICA,2010,68(18):1881-1886.
APA	Liu, CL .,Ye, YG .,Meng, QG .,Lu, ZQ .,Zhu, YH .,...&Yang, SX .(2010).Raman Spectroscopic Characteristics of Natural Gas Hydrate Recovered from Shenhu Area in South China Sea and Qilian Mountain Permafrost.ACTA CHIMICA SINICA,68(18),1881-1886.
MLA	Liu, CL ,et al."Raman Spectroscopic Characteristics of Natural Gas Hydrate Recovered from Shenhu Area in South China Sea and Qilian Mountain Permafrost".ACTA CHIMICA SINICA 68.18(2010):1881-1886.