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 |
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Authors: | Chul Kwak Stanley I Sandler Hun-Soo Byun |
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Affiliation: | (1) Department of Chemical Engineering, Kyungnam University, Gyeongnam, 631-701, Korea;(2) Department of Chemical Engineering, University of Delaware, Newark, Delaware 19716, USA;(3) Department of Chemical System Engineering, Chonnam National University, Yeosu, Jeonnam, 550-749, Korea |
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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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Keywords: | Vapor-Liquid Equilibrium High Pressure Carbon Dioxide W-S Mixing Rule |
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