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Phase equilibrium and Raman spectroscopic studies of semi-clathrate hydrates for methane, nitrogen and tetra-butyl-ammonium fluoride
Cai, Jing1,2; Xu, Chun-Gang1,2; Hu, Ya-Fei1,2,3; Ding, Ya-Long1,2,3; 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
DOI10.1016/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
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
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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.
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