Effect of the quadrupolar contribution of CO2 on the vapor-liquid equilibria and surface tensions of CO2-hydrocarbon binary mixtures

被引：7

作者：

Fu, Dong ^{[1
]}

Gu, Fang ^{[1
]}

Xie, Jialin ^{[1
]}

机构：

[1] North China Elect Power Univ, Sch Environm Sci & Engn, Baoding 071003, Peoples R China

来源：

FLUID PHASE EQUILIBRIA | 2015年 / 387卷

基金：

中国国家自然科学基金;

关键词：

PCP-SAFT; DGT; CO2-hydrocarbon; VLE; Surface tensions; ASSOCIATING FLUID THEORY; PERTURBED-CHAIN SAFT; EQUATION-OF-STATE; DENSITY-GRADIENT THEORY; CARBON-DIOXIDE; INTERFACIAL-TENSIONS; PHASE COMPOSITIONS; HYDROCARBON MIXTURES; PURE FLUIDS; SYSTEMS;

D O I：

10.1016/j.fluid.2014.12.024

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

An equation of state (EOS) was established by combining the perturbed-chain polar statistical associating fluid theory (PCP-SAFT) with density-gradient theory (DGT). The bulk and interfacial properties of carbon dioxide (CO2)-butane, CO2-decane, CO2-benzene, CO2-cyclohexane and CO2-tetradecane binary mixtures were investigated. To illustrate the effect of the quadrupolar contribution of CO2 on the bulk and interfacial properties, the calculated vapor liquid equilibria (VLE) and surface tensions were compared with those calculated from the perturbed-chain statistical associating fluid theory (PC-SAFT) and DGT, in which CO2 was treated as non-polar molecule. Results showed that by taking into account the quadrupolar contribution of CO2, both the VLE and surface tensions of CO2 hydrocarbon binary mixtures can be significantly improved compared with the experimental data. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：146 / 153

页数：8

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