화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.23, No.6, 1016-1022, November, 2006
DOI10.1007/s11814-006-0023-1  Export Citation
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
Chul Kwak, Stanley I. Sandler1, and Hun-Soo Byun2, †
  • Department of Chemical Engineering, Kyungnam University, Gyeongnam 631-701, Korea
  • 1Department of Chemical Engineering, University of Delaware, Newark 19716, Delaware, USA
  • 2Department of Chemical System Engineering, Chonnam National University, Yeosu, Jeonnam 550-749, Korea
E-mail:
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.
Keywords:Vapor-Liquid Equilibrium;High Pressure;Carbon Dioxide;W-S Mixing Rule
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