Adsorption of Methane on Water under Hydrate Formation Conditions

被引：6

作者：

Peng Baozi ^{[1
]}

Sun Changyu ^{[1
]}

Liu Peng ^{[2
]}

Chen Guangjin ^{[1
]}

机构：

[1] China Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China

[2] China Univ Petr, High Pressure Fluid Phase Behav & Property Res La, Beijing 102249, Peoples R China

来源：

CHINESE JOURNAL OF CHEMISTRY | 2009年 / 27卷 / 04期

基金：

中国国家自然科学基金;

关键词：

methane; interfacial tension; adsorption; surface excess; hydrate; SODIUM DODECYL-SULFATE; LINEAR GRADIENT THEORY; INTERFACIAL-TENSION; FILM GROWTH; SURFACE-TENSION; AQUEOUS-SOLUTION; CRYSTAL-GROWTH; PLUS WATER; PRESSURE; SYSTEM;

D O I：

10.1002/cjoc.200990115

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The variation of interfacial tension with pressure has been determined systemically for water in equilibrium with compressed methane at temperature from 274.2 to 282.2 K in the range of pressure from 0.1 to 10.1 MPa using the pendant-drop method. The results show that the interface tension decreased with increasing pressure when temperature was specified. Pressure has a great influence upon the interface tension at higher pressure. The surface excess concentrations of methane on water at different temperatures and pressures were calculated. The results showed that higher pressure and lower temperature corresponded to higher adsorption concentration of methane. At the same time, the surface adsorption free energies of methane were also calculated, indicating that the adsorption of methane on water under hydrate formation condition is more preferable than that at 298.2 K.

引用

页码：703 / 706

页数：4

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