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Issue 40, 2008
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Equation of state modeling of the phase equilibria of ionic liquid mixtures at low and high pressure

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Abstract

Accurate design of processes based on ionic liquids (ILs) requires knowledge of the phase behavior of the systems involved. In this work, the truncated perturbed chain polar statistical associating fluid theory (tPC-PSAFT) is used to correlate the phase behavior of binary and ternary IL mixtures. Both non-polar and polar solvents are examined, while methyl imidazolium ILs are used in all cases. tPC-PSAFT accounts explicitly for weak dispersion interactions, highly directive polar interactions between permanent dipolar and quadrupolar molecules and association between hydrogen bonding molecules. For mixtures of non-polar solvents, tPC-PSAFT predicts accurately the binary mixture data. For the case of polar solvents, a binary interaction parameter is fitted to the experimental data and the agreement between experiment and correlation is very good in all cases.

Graphical abstract: Equation of state modeling of the phase equilibria of ionic liquid mixtures at low and high pressure

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Article information


Submitted
17 Apr 2008
Accepted
30 Jun 2008
First published
29 Aug 2008

Phys. Chem. Chem. Phys., 2008,10, 6160-6168
Article type
Paper

Equation of state modeling of the phase equilibria of ionic liquid mixtures at low and high pressure

E. K. Karakatsani, I. G. Economou, M. C. Kroon, M. D. Bermejo, C. J. Peters and G. Witkamp, Phys. Chem. Chem. Phys., 2008, 10, 6160
DOI: 10.1039/B806584P

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