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

doi:10.1016/j.jct.2019.04.004

	Semiclathrate hydrate phase behaviour and structure for CH4 in the presence of tetrabutylammonium fluoride (TBAF)
	Shi, Lingli 1,2,3; Liang, Deqing 1,2,3
刊名	JOURNAL OF CHEMICAL THERMODYNAMICS
	2019-08-01
卷号	135 页码:252-259
关键词	Tetrabutylammonium fluoride Methane hydrate Phase equilibria Dissociation enthalpies Raman spectra
ISSN号	0021-9614
DOI	10.1016/j.jct.2019.04.004
通讯作者	Liang, Deqing(liangdq@ms.giec.ac.cn)
英文摘要	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.
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关键词	N-BUTYLAMMONIUM BROMIDE ; PLUS CARBON-DIOXIDE ; EQUILIBRIUM CONDITIONS ; DISSOCIATION CONDITIONS ; GAS-MIXTURES ; AQUEOUS-SOLUTIONS ; METHANE HYDRATE ; HALIDE BROMIDE ; COLD-STORAGE ; CO2 CAPTURE
WOS研究方向	Thermodynamics ; Chemistry
语种	英语
出版者	ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
WOS记录号	WOS:000467807400028
资助机构	National Natural Science Foundation of China ; Natural Science Foundation of Guangdong Province
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/24969]
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
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.