Predictions of activity coefficients of nearly athermal binary mixtures using cubic equations of state

被引：8

作者：

Sacomani, PA ^{[1
]}

Brignole, EA ^{[1
]}

机构：

[1] Univ Nacl Sur, CONICET, PLAPIQUI, RA-8000 Bahia Blanca, Buenos Aires, Argentina

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2003年 / 42卷 / 17期

关键词：

D O I：

10.1021/ie030028u

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

It is shown that cubic equations of state of the van der Waals family predict the ideal behavior of athermal solutions at infinite pressure. An expression for the infinite-dilution activity coefficient in binary mixtures is derived from the Soave-Redlich-Kwong (SRK) equation of state. The nonresidual contribution of this expression is used to predict the activity coefficients of athermal mixtures. In this work, we compare experimental infinite-dilution activity coefficients with predictions from different models. The comparison shows better agreement of the present model for light linear and branched alkanes diluted in normal alkanes of 20-36 carbon atoms.

引用

页码：4143 / 4145

页数：3

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