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In relation to this article, we declare that there is no conflict of interest.
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Received January 13, 2010
Accepted June 4, 2010
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Thermodynamic modeling of CO2 solubility in ionic liquid ([C(n)-mim] [Tf2N]; n=2, 4, 6, 8) with using Wong-Sandler mixing rule, Peng-Rabinson equation of state (EOS) and differential evolution (DE) method

1Chemical Engineering Department, School of Chemical & Petroleum Engineering, Shiraz University, Shiraz, Iran 2Chemical Engineering Department, Faculty of Engineering, Shahid Bahonar University of Kerman, Kerman, Iran
a.forghani@hotmail.com
Korean Journal of Chemical Engineering, January 2011, 28(1), 246-251(6), 10.1007/s11814-010-0345-x
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Abstract

Environmental and safety regulations are creating increasing interest in ionic liquids which have been used as alternative solvents for a wide range of industrial applications. Knowing the phase equilibrium of these materials is very important. In this study, the solubility of CO2 in ionic liquid 1-alkyl-3 methylimidazolium bis (trifluoromethylsulfonyl) imide ([C(n)-mim][Tf2N]; n=2, 4, 6, 8) was probed with the Peng-Robinson (PR) equation of state (EOS) and Wong-Sandler mixing rule and van Laar model for excess Gibbs free energy. The differential evolution (DE) optimization_x000D_ method was applied to optimize the binary interaction parameter and activity coefficients. Moreover, binary interaction parameters and activity coefficients were presented as mathematical correlations that for various materials have depended on temperature. Our results showed that average absolute derivations of our proposed model were less than other existing models, and by using the aforesaid method better prediction could be achieved.

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