Development of an universal group contribution equation of state I. Prediction of liquid densities for pure compounds with a volume translated Peng-Robinson equation of state

被引：133

作者：

Ahlers, J ^{[1
]}

Gmehling, J ^{[1
]}

机构：

[1] Univ Oldenburg, Lehrstuhl Tech Chem FB9, D-26111 Oldenburg, Germany

来源：

FLUID PHASE EQUILIBRIA | 2001年 / 191卷 / 1-2期

关键词：

equation of state; density; critical point; volume translation;

D O I：

10.1016/S0378-3812(01)00626-4

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

With a view to the development of an universal group contribution equation of state, the Peng-Robinson (PR) equation of state (EOS) has been modified to obtain a better description of saturated liquid densities for the pure compounds. A simple improved volume translation together with a temperature dependent volume correction deliver an accurate representation of this property near and far from the critical point for polar and non-polar substances. The fitted parameters have been generalized as a function of the critical compressibility factor. The results are compared with the results of the original PR and the Soave-Redlich-Kwong (SRK) EOS. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：177 / 188

页数：12

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