Phase equilibrium and Raman spectroscopic studies of semi-clathrate hydrates for methane, nitrogen and tetra-butyl-ammonium fluoride

doi:10.1016/j.fluid.2015.09.054

GIEC OpenIR > 中国科学院广州能源研究所

	Phase equilibrium and Raman spectroscopic studies of semi-clathrate hydrates for methane, nitrogen and tetra-butyl-ammonium fluoride
	Cai, Jing 1,2; Xu, Chun-Gang 1,2; Hu, Ya-Fei 1,2,3; Ding, Ya-Long 1,2,3; Li, Xiao-Sen1,2
	2016-04-15
发表期刊	FLUID PHASE EQUILIBRIA
卷号	413 页码:48-52
摘要	The experimental study on phase equilibrium conditions for semi-clathrate hydrates formed in the systems of CH4/N-2 gas mixture and tetra-butyl-ammonium fluoride (TBAF) with different ratios (0.210, 0.293 and 0.500 mol%) to water was conducted in this paper. The experiments were carried out under the conditions of 281.15-291.15 K and 0.30-3.70 MPa. The structures of the hydrates were characterized using in-situ Raman spectroscopy at 276.15 K and 2.50 MPa. At a certain given pressure, the equilibrium temperature of the semi-clathrate hydrates formed in the systems with 0.500 mol% TBAF is significantly higher than that of semi-clathrate hydrates formed the systems with 0.210 or 0.293 mol% TBAF, and even higher than that of structure II hydrates formed in the systems with THF-SDS. Moreover, TBAF has more positive influence on enhancing dissociation enthalpies of the hydrates than THF. Due to the quite weak signal of N N triple bond vibration or/and seldom N-2 molecules encaged into the cavities, only CH4 molecules could be determined clearly in the mixed hydrates. In addition, the crystal morphology of the semi-clathrate hydrates is affected by the ratio of TBAF to water. (C) 2015 Elsevier B.V. All rights reserved.
文章类型	Article
关键词	Hydrate Phase Equilibrium Tbaf Semi-clathrate Dissociation Enthalpy
WOS标题词	Science & Technology ; Physical Sciences ; Technology
DOI	10.1016/j.fluid.2015.09.054
研究领域[WOS]	Thermodynamics ; Chemistry ; Engineering
关键词[WOS]	CARBON-DIOXIDE ; GAS HYDRATE ; BROMIDE ; SEPARATION ; HYDROGEN ; CHLORIDE ; CRYSTALLIZATION ; TETRAHYDROFURAN ; PROMOTERS ; MIXTURES
收录类别	SCI
语种	英语
WOS类目	Thermodynamics ; Chemistry, Physical ; Engineering, Chemical
WOS记录号	WOS:000371554100008
引用统计	被引频次：17[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/344007/11132
专题	中国科学院广州能源研究所
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, 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.Univ Chinese Acad Sci, Beijing 100083, 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	Cai, Jing,Xu, Chun-Gang,Hu, Ya-Fei,et al. Phase equilibrium and Raman spectroscopic studies of semi-clathrate hydrates for methane, nitrogen and tetra-butyl-ammonium fluoride[J]. FLUID PHASE EQUILIBRIA,2016,413:48-52.
APA	Cai, Jing,Xu, Chun-Gang,Hu, Ya-Fei,Ding, Ya-Long,&Li, Xiao-Sen.(2016).Phase equilibrium and Raman spectroscopic studies of semi-clathrate hydrates for methane, nitrogen and tetra-butyl-ammonium fluoride.FLUID PHASE EQUILIBRIA,413,48-52.
MLA	Cai, Jing,et al."Phase equilibrium and Raman spectroscopic studies of semi-clathrate hydrates for methane, nitrogen and tetra-butyl-ammonium fluoride".FLUID PHASE EQUILIBRIA 413(2016):48-52.