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Correlation of vapor-liquid equilibria for binary mixtures with free energy-based equation of state mixing rules: Carbon dioxide with alcohols, hydrocarbons, and several other compounds

  • Separation Technology, Thermodynamics
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Abstract

The correlation of vapor-liquid equilibrium data for high-pressure carbon dioxide systems is of interest in a number of industrial applications, including supercritical extraction. Here, we consider the correlation of data for 12 binary systems of carbon dioxide separately with alcohols, with hydrocarbons, and with acetone, benzene, and water. The Wong-Sandler (W-S) and modified Huron — Vidal first order (MHV1) free energy-based equation of state mixing rules (the W-S and MHV1 models) were used in the calculations. Both combined equation of state+free energy models generally resulted in good correlations of the experimental data over wide ranges of temperature and pressure with temperature — independent parameters. However, for the carbon dioxide+water system, the W-S model produced an 11% average absolute deviation in pressure, while no parameter that resulted in an AAD in pressure of less than 20% could be found for the MHV1 model.

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Authors and Affiliations

  1. Department of Chemical Engineering, Kyungnam University, Gyeongnam, 631-701, Korea

    Chul Kwak, Stanley I. Sandler & Hun-Soo Byun

  2. Department of Chemical Engineering, University of Delaware, Newark, Delaware, 19716, USA

    Stanley I. Sandler

  3. Department of Chemical System Engineering, Chonnam National University, Yeosu, Jeonnam, 550-749, Korea

    Hun-Soo Byun

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  1. Chul Kwak
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  2. Stanley I. Sandler
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  3. Hun-Soo Byun
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Correspondence to Hun-Soo Byun.

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Kwak, C., Sandler, S.I. & Byun, HS. Correlation of vapor-liquid equilibria for binary mixtures with free energy-based equation of state mixing rules: Carbon dioxide with alcohols, hydrocarbons, and several other compounds. Korean J. Chem. Eng. 23, 1016–1022 (2006). https://doi.org/10.1007/s11814-006-0023-1

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  • DOI: https://doi.org/10.1007/s11814-006-0023-1

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