In situ Raman investigation on mixed CH4-C3H8 hydrate dissociation in the presence of polyvinylpyrrolidone

doi:10.1016/j.fuel.2017.11.063

	In situ Raman investigation on mixed CH4-C3H8 hydrate dissociation in the presence of polyvinylpyrrolidone
	Tang, Cuiping 1,2,3,4; Zhou, Xuebing 1,2,3,4; Li, Dongliang 1,2,3,4; Zhao, Xiangyong 1,2,3,4; Liang, Deqing 1,2,3,4
刊名	FUEL
	2018-02-15
卷号	214 页码:505-511
关键词	Gas hydrate Dissociation Kinetic inhibitor Raman spectra
ISSN号	0016-2361
DOI	10.1016/j.fuel.2017.11.063
通讯作者	Liang, Deqing(Liangdq@ms.giec.ac.cn)
英文摘要	The dissociation of hydrates containing kinetic inhibitors is important for the treatment of gas hydrate blockages in pipelines. In this work, the dissociation of natural gas hydrates in the presence of polyvinylpyrrolidone (PVP) was investigated by Raman spectroscopy and cryo-scanning electron microscope (SEM). The natural gas hydrates were formed from a synthetic natural gas mixture composed of CH4 (95.0 vol%) and C3H8 (5.0 vol%). The results showed that the crystallographic structure of the formed hydrate was structure II (sII) with CH4 encaged in both small and large cages and C3H8 in large cages. Raman spectra showed that PVP could not be captured by the sII hydrate cage and had no influence on the structural type of the hydrate. However, PVP inhibited the occupancy of CH4 molecules in the large cages. The dissociation of hydrates in the presence of PVP was slower than without PVP. No other transient structure was observed during the dissociation and gas hydrate cages were suggested to collapse as an entity, without the interference of PVP. The microstructure of the gas hydrates appeared to change from close-to-spherical to scale-like when PVP was added.
资助项目	National Natural Science Foundation of China[41406103] ; Program of Chinese Academy of Sciences[KGZD-EW-301]
WOS关键词	GAS HYDRATE ; METHANE HYDRATE ; MOLECULAR-DYNAMICS ; KINETIC INHIBITORS ; CRYSTAL-GROWTH ; WATER DROPLETS ; DECOMPOSITION ; PROPANE ; SPECTROSCOPY ; SYSTEMS
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000417103800053
资助机构	National Natural Science Foundation of China ; Program of Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/22818]
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.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Guangdong, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China 3.Chinese Acad Sci, Key Lab Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China 4.Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Tang, Cuiping,Zhou, Xuebing,Li, Dongliang,et al. In situ Raman investigation on mixed CH4-C3H8 hydrate dissociation in the presence of polyvinylpyrrolidone[J]. FUEL,2018,214:505-511.
APA	Tang, Cuiping,Zhou, Xuebing,Li, Dongliang,Zhao, Xiangyong,&Liang, Deqing.(2018).In situ Raman investigation on mixed CH4-C3H8 hydrate dissociation in the presence of polyvinylpyrrolidone.FUEL,214,505-511.
MLA	Tang, Cuiping,et al."In situ Raman investigation on mixed CH4-C3H8 hydrate dissociation in the presence of polyvinylpyrrolidone".FUEL 214(2018):505-511.