In situ Raman Spectroscopic Observation of Micro-Processes of Methane Hydrate Formation and Dissociation

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	In situ Raman Spectroscopic Observation of Micro-Processes of Methane Hydrate Formation and Dissociation
	Liu, CL (Liu Chang-ling)6; Ye, YG (Ye Yu-guang); Meng, QG (Meng Qing-guo); Lu, WJ (Lue Wan-jun); Wang, FF (Wang Fei-fei)
刊名	SPECTROSCOPY AND SPECTRAL ANALYSIS
	2011
卷号	31 期号:6 页码:1524-1528
关键词	Methane hydrate Laser Raman spectroscopy High pressure capillary Formation and decomposition
ISSN号	1000-0593
英文摘要	Micro laser Raman spectroscopic technique was used for in situ observation of the micro-processes of methane hydrate formed and decomposed in a high pressure transparent capillary. The changes in clathrate structure of methane hydrate were investigated during these processes. The results show that, during hydrate formation, the Raman peak(2 917 cm(-1))of methane gas gradually splits into two peaks (2 905 and 2 915 cm(-1)) representing large and small cages, respectively, suggesting that the dissolved methane molecules go into two different chemical environments. In the meantime, the hydrogen bonds interaction is strengthened because water is changing from liquid to solid state gradually. As a result, the O-H stretching vibrations of water shift to lower wavenumber. During the decomposition process of methane hydrates, the Raman peaks of the methane molecules both in the large and small cages gradually clear up, and finally turn into a single peak of methane gas. The experimental results show that laser Raman spectroscopy can accurately demonstrate some relevant information of hydrate crystal structure changes during the formation and dissociation processes of methane hydrate.
学科主题	岩矿鉴定与测试
WOS关键词	GAS
WOS研究方向	Spectroscopy
语种	中文
出版者	OFFICE SPECTROSCOPY & SPECTRAL ANALYSIS
WOS记录号	WOS:000291227800020
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39251]
专题	中国地质调查局
作者单位	1.[Liu Chang-ling 2.Ye Yu-guang 3.Minist Land & Resources, Key Lab Marine Hydrocarbon Resources & Environm G, Qingdao 266071, Peoples R China [Liu Chang-ling 4.Qingdao Inst Marine Geol, Qingdao 266071, Peoples R China [Lue Wan-jun 5.China Univ Geosci, Fac Resources, Wuhan 430074, Peoples R China 6.中国地质调查局青岛海洋地质研究所
推荐引用方式 GB/T 7714	Liu, CL ,Ye, YG ,Meng, QG ,et al. In situ Raman Spectroscopic Observation of Micro-Processes of Methane Hydrate Formation and Dissociation[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2011,31(6):1524-1528.
APA	Liu, CL ,Ye, YG ,Meng, QG ,Lu, WJ ,&Wang, FF .(2011).In situ Raman Spectroscopic Observation of Micro-Processes of Methane Hydrate Formation and Dissociation.SPECTROSCOPY AND SPECTRAL ANALYSIS,31(6),1524-1528.
MLA	Liu, CL ,et al."In situ Raman Spectroscopic Observation of Micro-Processes of Methane Hydrate Formation and Dissociation".SPECTROSCOPY AND SPECTRAL ANALYSIS 31.6(2011):1524-1528.