Measurement of vapor–liquid equilibria (VLE) and excess enthalpies (H) of binary systems with 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide and prediction of these properties and γ using modified UNIFAC (Dortmund) |
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Authors: | Silke Nebig,Rainer Bö ltsJü rgen Gmehling |
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Affiliation: | Carl von Ossietzky Universität Oldenburg, Technische Chemie, D-26111 Oldenburg, Federal Republic of Germany |
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Abstract: | Vapor–liquid equilibria (VLE) and excess enthalpies (HE) were measured for a variety of alkanes, alkenes, aromatics, alcohols, ketones and water in several ionic liquids, 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [EMIM]+[BTI]−, 1-butyl-3-methyl-imidazolium bis(trifluoromethylsulfonyl)imide [BMIM]+[BTI]−, 1-hexyl-3-methyl-imidazolium bis(trifluoromethylsulfonyl)imide [HMIM]+[BTI]− and 1-octyl-3-methyl-imidazolium bis(trifluoromethylsulfonyl)imide [OMIM]+[BTI]−, covering the temperature range from 323.15 to 413.15 K. The new data were used together with the already available experimental data for imidazolium compounds to fit the required group interaction parameters for modified UNIFAC (Dortmund). The results show that in the future modified UNIFAC (Dortmund) can be applied successfully also for systems with ionic liquids. |
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Keywords: | Ionic liquids Vapor&ndash liquid equilibria Excess enthalpies Modified UNIFAC (Dortmund) |
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