A correlation method for isobaric vapor-liquid and vapor-liquid-liquid equilibria data of binary systems

被引：29

作者：

Iwakabe, Koichi ^{[1
]}

Kosuge, Hitoshi ^{[2
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Res Inst Innovat sustainable Chem, Tsukuba, Ibaraki 3058565, Japan

[2] Tokyo Inst Technol, Grad Sch Sci & Engn, Dept Chem Engn, Tokyo 1528552, Japan

来源：

FLUID PHASE EQUILIBRIA | 2008年 / 266卷 / 1-2期

关键词：

partially immiscible mixture; azeotrope; prediction; activity coefficient; NRTL; UNIQUAC; coordination number;

D O I：

10.1016/j.fluid.2008.01.019

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A correlation method for isobaric vapor-liquid equilibria (VLE) and vapor-liquid-liquid equilibria (VLLE) of binary systems was proposed. Taking the coordination number in UNIQUAC model as a fitting parameter (three-parameter UNIQUAC model) and employing an objective function of relative difference between the experimental and the predicted temperatures of VLE data, the experimental VLLE data were fairly reproduced both for water + 1-butanol and 2-butanol + water systems. Especially for 2-butanol + water system, the calculated homogeneous azeotropic point was also in good agreement, which could not be obtained by the conventional procedure. The proposed method was also validated by several examples. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：202 / 210

页数：9

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