Semiclathrate hydrate phase behaviour and structure for CH4 in the presence of tetrabutylammonium fluoride (TBAF)

doi:10.1016/j.jct.2019.04.004

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	Semiclathrate hydrate phase behaviour and structure for CH4 in the presence of tetrabutylammonium fluoride (TBAF)
	Shi, Lingli 1,2,3; Liang, Deqing1,2,3
	2019-08-01
发表期刊	JOURNAL OF CHEMICAL THERMODYNAMICS
ISSN	0021-9614
卷号	135 页码:252-259
通讯作者	Liang, Deqing(liangdq@ms.giec.ac.cn)
摘要	Phase behaviour including phase equilibria and dissociation enthalpies and structure of double semiclathrate hydrates formed with tetrabutylammonium fluoride (TBAF) + CH4 were measured to evaluate the performance of TBAF for hydrate based industrial applications. The phase equilibria and the dissociation enthalpies for TBAF + CH4 semiclathrate hydrate (SCH) with (0.02-0.15) salt mass fraction were obtained by employing the isochoric pressure-search method and calculated from the experimental data with Clausius-Clapeyron equation, respectively. A confocal Raman spectrometer was applied to analyze the structure of (TBAF + CH4) SCHs. Data showed that TBAF strongly enhanced the stability of CH4 hydrates by increasing the equilibrium temperature at a given pressure. The Raman spectra revealed that small 5(12) cages of TBAF hydrates could trap CH4 molecules. In particular, the Raman spectra of double TBAF + CH4 SCHs, as compared with those of pure TBAF SCHs, indicated that the large cages which already trapped the cation of TBAF also had the possibility of encaging CH4 molecules at low salt concentrations (<0.12 mass fraction). (C) 2019 Elsevier Ltd.
关键词	Tetrabutylammonium fluoride Methane hydrate Phase equilibria Dissociation enthalpies Raman spectra
DOI	10.1016/j.jct.2019.04.004
关键词[WOS]	N-BUTYLAMMONIUM BROMIDE ; PLUS CARBON-DIOXIDE ; EQUILIBRIUM CONDITIONS ; DISSOCIATION CONDITIONS ; GAS-MIXTURES ; AQUEOUS-SOLUTIONS ; METHANE HYDRATE ; HALIDE BROMIDE ; COLD-STORAGE ; CO2 CAPTURE
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51606198] ; National Natural Science Foundation of China[41603062] ; Natural Science Foundation of Guangdong Province[2016A030310126]
WOS研究方向	Thermodynamics ; Chemistry
项目资助者	National Natural Science Foundation of China ; Natural Science Foundation of Guangdong Province
WOS类目	Thermodynamics ; Chemistry, Physical
WOS记录号	WOS:000467807400028
出版者	ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
引用统计	被引频次：18[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/344007/24970
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, CAS Key Lab Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China 2.Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Guangdong, Peoples R China 3.Guangdong Prov Key Lab New & Renewable Energy Res, 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	Shi, Lingli,Liang, Deqing. Semiclathrate hydrate phase behaviour and structure for CH4 in the presence of tetrabutylammonium fluoride (TBAF)[J]. JOURNAL OF CHEMICAL THERMODYNAMICS,2019,135:252-259.
APA	Shi, Lingli,&Liang, Deqing.(2019).Semiclathrate hydrate phase behaviour and structure for CH4 in the presence of tetrabutylammonium fluoride (TBAF).JOURNAL OF CHEMICAL THERMODYNAMICS,135,252-259.
MLA	Shi, Lingli,et al."Semiclathrate hydrate phase behaviour and structure for CH4 in the presence of tetrabutylammonium fluoride (TBAF)".JOURNAL OF CHEMICAL THERMODYNAMICS 135(2019):252-259.