Acta Phys. -Chim. Sin. ›› 2001, Vol. 17 ›› Issue (02): 155-160.doi: 10.3866/PKU.WHXB20010213

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Study on Vapor-Liquid Phase Equilibria for CO2-C2H5OH System

Tian Yi-Ling;Han Ming;Chen Li;Feng Ji-Jun;Qin Ying   

  1. Department of Chemistry,Tianjin University,Tianjin 300072
  • Received:2000-06-26 Revised:2000-09-30 Published:2001-02-15
  • Contact: Tian Yi-Ling

Abstract: The vaporliquid phase equilibria of the binary system of CO2C2H5OH were measured for four isotherms between 60 ℃ and 180 ℃ under the pressure range of 5.0 MPa to 14.5 MPa.The measurements were carried out in a cylindrical autoclave with a moveable piston and a window allowing observation. The compositions,densities and molar volumes of the two coexisting phases are presented. The critical values Tc.pc,xc were predicted.We have correlated phase equilibrium data with the PengRobinson equation of state and the WongSandle mixture combination rule for this system.The calculated results agree fairly with the experimental data.

Key words: High-pressure phase equilibrium, Ethanol, Carbon dioxide,