Activity coefficients at infinite dilution for different alcohols and ketones in [EMpy][ESO4]: Experimental data and modeling with PC-SAFT

被引：12

作者：

Dominguez, Irene ^{[1
]}

Gonzalez, Begona ^{[2
]}

Orge, Beatriz ^{[2
]}

Held, Christoph ^{[3
]}

Voges, Matthias ^{[3
]}

Macedo, Eugenia A. ^{[1
]}

机构：

[1] Univ Porto, Fac Engn, LSRE, Associate Lab LSRE LCM, Rua Dr Roberto Frias, P-4200465 Oporto, Portugal

[2] Univ Vigo, Dept Chem Engn, Adv Separat Proc Grp, Campus Lagoas Marcosende, Vigo 36310, Spain

[3] Tech Univ Dortmund, Dept Biochem & Chem Engn, Lab Thermodynam, Emil Figge Str 70, D-44227 Dortmund, Germany

来源：

FLUID PHASE EQUILIBRIA | 2016年 / 424卷

关键词：

Ionic liquid; Activity coefficient at infinite dilution; PC-SAFT; PERTURBED-CHAIN SAFT; EQUATION-OF-STATE; ASSOCIATING FLUID THEORY; IONIC LIQUIDS MEASUREMENTS; BINARY-MIXTURES; SOLUBILITY; SYSTEMS; TEMPERATURE; EQUILIBRIA; PHASE;

D O I：

10.1016/j.fluid.2015.09.003

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Experimental activity coefficients of different alcohols (methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol and 1-pentanol) and ketones (acetone, 2-butanone, 2-pentanone, 3-methyl-2-butanone and 4-methyl-2-pentanone) at infinite dilution in 1-Ethyl 3-Methylpyridinium Ethyl Sulfate ionic liquid (IEMpyl[ESO4]) were measured at temperatures from 323 to 373 K, using the inverse gas chromatography technique. The experimental results show that infinite dilution activity coefficients of both alcohols and ketones only marginally depend on temperature between 323 and 373 K. Further, it could be observed that infinite dilution activity coefficients of methanol, ethanol, and 1-propanol are lower than unity, whereas 1-butanol and 1-pentanol activity coefficients at infinite dilution were higher than unity. In contrast, the activity coefficients at infinite dilution of all ketones were found to be greater than unity. Perturbed-Chain Statistical Associating Fluid Theory (PC-SAFT) was used to model the obtained experimental data. Firstly, the pure-component parameters for [EMpy][ESO4] were determined by fitting experimental pure-IL densities and activity coefficients of 1-propanol. Based on this, activity coefficients in binary [EMpy][ESO4]/alcohol and [EMpy][ESO4]/ketone mixtures were modeled with good agreement to experimental data. Binary interaction parameters between [EMpy][ESO4]/alcohol and [EMpy][ESO4]/ketone were used. They were found to depend logarithmically on the chain length of any alcohol or ketone, respectively. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：32 / 40

页数：9