Selection of entrainers in the 1-hexene/n-hexane system with a limited solubility

Journal article
(Original article)


Publication Details

Author(s): Lei Z, Arlt W, Wasserscheid P
Journal: Fluid Phase Equilibria
Publisher: Elsevier
Publication year: 2007
Volume: 260
Journal issue: 1
Pages range: 29-35
ISSN: 0378-3812


Abstract


Vapor-liquid equilibria (VLE) have been measured for five 1-hexene/n-hexane/ionic liquid systems and 1-hexene/n-hexane/NMP (N-methyl-2-pyrrolidone) system with a headspace-gas chromatography (HSGC) apparatus at 333.15 K. The ionic liquids investigated were 1,3-dimethylimidazolium tetrafluoroborate [CMIM][BF], 1-butyl-3-methylimidazolium tetrafluoroborate [CMIM][BF], 1-methyl-3-octylimidazolium tetrafluoroborate [CMIM][BF], 1,3-dimethylimidazolium dicyanamide [CMIM][N(CN)] and 1-octylquinolinium bis(trifluoromethylsulfonyl)amide [CChin][BTA]. It was found that at low feeding concentration of 1-hexene and n-hexane, the separation ability of ionic liquids is in the order of [CMIM][BF] > [CMIM][BF] ≈ [CMIM][N(CN)] > [CMIM][BF] > [CChin][BTA], which is consistent with the priori prediction of the COSMO-RS (conductor-like screening model for real solvents) model. But at high feeding concentration, the separation ability of ionic liquids is in the order of [CMIM][BF] < [CMIM][BF] ≈ [CMIM][N(CN)] < [CMIM][BF] < [CChin][BTA]. The liquid demixing effect should be taken into account. The activity coefficients of 1-hexene and n-hexane at infinite dilution calculated with the COSMO-RS model were correlated using the NRTL, Wilson and UNIQUAC model. In this work the predictive results from the COSMO-RS model and UNIFAC model for the 1-hexene/n-hexane and 1-hexene/n-hexane/NMP systems were compared. The UNIFAC model is one of the most important academic contributions by Prof. Jürgen Gmehling. © 2006 Elsevier B.V. All rights reserved.



FAU Authors / FAU Editors

Arlt, Wolfgang Prof. Dr.-Ing.
Lehrstuhl für Thermische Verfahrenstechnik
Wasserscheid, Peter Prof. Dr.
Lehrstuhl für Chemische Reaktionstechnik


How to cite

APA:
Lei, Z., Arlt, W., & Wasserscheid, P. (2007). Selection of entrainers in the 1-hexene/n-hexane system with a limited solubility. Fluid Phase Equilibria, 260(1), 29-35. https://dx.doi.org/10.1016/j.fluid.2006.06.009

MLA:
Lei, Zhigang, Wolfgang Arlt, and Peter Wasserscheid. "Selection of entrainers in the 1-hexene/n-hexane system with a limited solubility." Fluid Phase Equilibria 260.1 (2007): 29-35.

BibTeX: 

Last updated on 2018-29-10 at 20:50