Activity coefficients at infinite dilution for solutes in the trioctylmethylammonium bis(trifluoromethylsulfonyl)imide ionic liquid using gas-liquid chromatography

被引：40
|
作者：
Gwala, Nobuhle V. [1 ]
Deenadayalu, Nirmala [1 ]
Tumba, Kaniki [2 ]
Ramjugernath, Deresh [2 ]
机构：
[1] Durban Univ Technol, Dept Chem, ZA-4000 Durban, South Africa
[2] Univ KwaZulu Natal, Sch Chem Engn, Thermodynam Res Unit, ZA-4000 Durban, South Africa
来源：
JOURNAL OF CHEMICAL THERMODYNAMICS | 2010年 / 42卷 / 02期
基金：
新加坡国家研究基金会;
关键词：
Activity coefficients at infinite dilution; Selectivity; Ionic liquid; Gas-liquid chromatography; VOLATILE ORGANIC-COMPOUNDS; THERMODYNAMIC PROPERTIES; VIRIAL-COEFFICIENTS; MIXTURES; HYDROCARBONS; WATER; GLC; HEXAFLUOROPHOSPHATE; ALKYLBENZENES; ALCOHOLS;
D O I：
10.1016/j.jct.2009.08.012
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The activity coefficient at infinite dilution (gamma(infinity)(13)) for 30 solutes: alkanes, alkenes, cycloalkanes, alkynes, ketones, alcohols, and aromatic compounds was determined from gas-liquid chromatography (glc) measurements at three temperatures (303.15, 313.15, and 323.15) K. The ionic liquid: trioctylmethylammonium bis(trifluoromethylsulfonyl)imide, was used as the stationary phase. For each temperature, gamma(infinity)(13) values were determined using two columns with different mass percent packing of the ionic liquid. The selectivity (S-12(infinity)) value was calculated from the gamma(infinity)(13) to determine the suitability of the solvent as a potential entrainer for extractive distillation in the separation of an hexane/benzene mixture, indicative of a typical industrial separation problem for benchmarking purposes. (C) 2009 Elsevier Ltd. All rights reserved.
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页码：256 / 261
页数：6
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