Activity coefficients at infinite dilution of organic solutes in the ionic liquid 1-octyl-3-methylimidazolium hexafluorophosphate using gas-liquid chromatography at T = (313.15, 323.15, and 333.15) K

被引：24

作者：

Olivier, Eugene ^{[1
]}

Letcher, Trevor M. ^{[1
]}

Naidoo, Paramespri ^{[1
]}

Ramjugernath, Deresh ^{[1
]}

机构：

[1] Univ KwaZulu Natal, Sch Chem Engn, Thermodynam Res Unit, ZA-4041 Durban, South Africa

来源：

JOURNAL OF CHEMICAL THERMODYNAMICS | 2010年 / 42卷 / 05期

基金：

新加坡国家研究基金会;

关键词：

Activity coefficient at infinite dilution; Ionic liquid; 1-Octy1-3-methylimidazolium hexafluorophosphate; THERMODYNAMIC PROPERTIES; NONPOLAR SOLUTES; MIXTURES; HYDROCARBONS; PREDICTION; HEXADECANE; SOLVENTS; BEHAVIOR; UNIFAC; CATION;

D O I：

10.1016/j.jct.2009.12.004

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Activity coefficients at infinite dilution were determined for 24 solutes: n-alkanes, alk-1-enes, alk-1-ynes, cycloalkanes, alkylbenzenes and alcohols in the ionic liquid 1-octyl-3-methylimidazolium hexafluorophosphate, [OMIM][PF6], by gas-liquid chromatography at three different temperatures T = (313.15, 323.15, and 333.15) K. The partial molar excess enthalpy values at infinite dilution were calculated from the experimental data over the same temperature range. Capacities and selectivities at infinite dilution for the systems hexane/benzene and methanol/benzene were determined from the experimental data and compared to the literature values for other ionic liquids, as well as for industrial molecular solvents. The influence of the cation and anion of the ionic liquid on the activity coefficient is discussed, as well as the usefulness of [OMIM][PF6] in separating organic liquids. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：646 / 650

页数：5

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