Phase behavior of mixture of supercritical CO2 + ionic liquid: Thermodynamic consistency test of experimental data

Authors

  • Ali Eslamimanesh,

    1. Dept. of Chemical and Biomolecular Engineering, Clarkson University, Potsdam, NY
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  • Amir H. Mohammadi,

    Corresponding author
    1. Institut de Recherche en Génie Chimique et Pétrolier (IRGCP), Paris Cedex, France
    2. Thermodynamics Research Unit, School of Chemical Engineering, University of KwaZulu-Natal, Howard College Campus, Durban, South Africa
    • Correspondence concerning this article should be addressed to A. H. Mohammadi at a.h.m@irgcp.fr.

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  • Yousef Salamat,

    1. Dept. of Chemical Engineering, Faculty of Engineering, Arak University, Arak, Iran
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  • Mohammad-Javad Shojaei,

    1. Dept. of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
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  • Somayeh Eskandari,

    1. Dept. of Bioengineering, Clemson University, Clemson, SC
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  • Dominique Richon

    1. Thermodynamics Research Unit, School of Chemical Engineering, University of KwaZulu-Natal, Howard College Campus, Durban, South Africa
    2. Dept. of Biotechnology and Chemical Technology, School of Science and Technology, Aalto University, Aalto, Finland
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Abstract

Various models have been applied composed of the Peng-Robinson equation of state (PR-EoS) and the Soave-Redlich-Kwong equation of state (SRK-EoS) associated with three mixing rules including the following: Wong-Sandler (WS), van der Waals one (vdW1), and van der Waals two (vdW2) for phase behavior modeling of mixtures of supercritical CO2 + different ionic liquids in vapor–liquid equilibrium (VLE) region. It has been found that the PR EoS implying the WS mixing rule can be used as a reliable thermodynamic model to perform a thermodynamic consistency test on the experimental data of phase behaviors of the supercritical CO2 + ionic liquid systems (19 commonly-used ionic liquids have been studied). The results show that 40% of the experimental data seem to be thermodynamically consistent, 55.5% seem to be thermodynamically inconsistent, and 4.5% seem to be not fully consistent. © 2013 American Institute of Chemical Engineers AIChE J, 59: 3892–3913, 2013

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