Thermodynamic stability of hydrogen plus tetra-n-butyl ammonium bromide mixed gas hydrate in nonstoichiometric aqueous solutions

被引：138

作者：

Hashimoto, Shunsuke ^{[1
]}

Sugahara, Takeshi ^{[1
]}

Moritoki, Masato ^{[1
]}

Sato, Hiroshi ^{[1
]}

Ohgaki, Kazunari ^{[1
]}

机构：

[1] Osaka Univ, Grad Sch Engn Sci, Div Chem Engn, Osaka 5608531, Japan

来源：

CHEMICAL ENGINEERING SCIENCE | 2008年 / 63卷 / 04期

关键词：

gas hydrate; phase equilibria; gas storage; stability; solutions; gases;

D O I：

10.1016/j.ces.2007.11.001

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Phase equilibrium (pressure-temperature) relations of the hydrogen + tetra-n-butyl ammonium bromide mixed gas hydrate system have been measured for various concentrations of tetra-n-butyl ammonium bromide aqueous solutions. The three-phase equilibrium curves obtained in the present study are shifted to the low-temperature or high-pressure side from that of the stoichiometric tetra-n-butyl ammonium bromide solution. Each three-phase equilibrium curve of hydrogen + tetra-n-butyl ammonium bromide mixed gas hydrate converges at the atmospheric equilibrium point of the pure tetra-n-butyl ammonium bromide hydrate for the mother aqueous solution of same mole fraction. The hydrate-cage occupancy of hydrogen in the hydrogen + tetra-n-butyl ammonium bromide mixed gas hydrate is in variable in a range of tetra-n-butyl ammonium bromide mole fraction from 0.006 to 0.070 in the aqueous solution. Hydrogen is entrapped only in the small cages of tetra-n-butyl ammonium bromide hydrates. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：1092 / 1097

页数：6

共 18 条

[1] Clathrate hydrates of tetrabutylammonium and tetraisoamylammonium halides [J].