Modeling interfacial tension of (CH4+N2)+H2O and (N2+CO2)+H2O systems using linear gradient theory

被引：30

作者：

Khosharay, Shahin ^{[1
]}

Varaminian, Farshad ^{[1
]}

机构：

[1] Semnan Univ, Sch Chem Gas & Petr Engn, Semnan, Iran

来源：

KOREAN JOURNAL OF CHEMICAL ENGINEERING | 2013年 / 30卷 / 03期

关键词：

Interfacial Tension; CPA Equation of State; Linear Gradient Theory; Ternary Mixtures; DENSITY-FUNCTIONAL THEORY; SEMI-EMPIRICAL THEORY; SURFACE-TENSION; FLUID INTERFACES; FREE-ENERGY; CORRESPONDING-STATES; TERNARY MIXTURES; MOLECULAR THEORY; BINARY-MIXTURES; WATER-SYSTEMS;

D O I：

10.1007/s11814-012-0187-9

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The linear gradient theory (LGT) of fluid interfaces in combination with the cubic-plus-association equation of state (CPA EOS) is applied to determine the interfacial tensions of (CH4+N-2)+H2O and (N-2+CO2)+H2O ternary mixtures from 298-373 K and 10-300 bar. First, the pure component influence parameters of CH4, N-2, CO2 and H2O are obtained. Then, temperature-dependent expressions of binary interaction coefficient for (CH4+H2O), (N-2+H2O) and (CO2+H2O) are correlated. These empirical correlations of pure component influence parameters and binary interaction coefficients are applied for ternary mixtures. For (CH4+N-2)+H2O and (N-2+CO2)+H2O mixtures, the predictions show good agreement with experimental data (overall AAD similar to 1.31%).

引用

页码：724 / 732

页数：9