物理化学学报 >> 2001, Vol. 17 >> Issue (02): 155-160.doi: 10.3866/PKU.WHXB20010213

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高压下CO2-乙醇二元系统的气液平衡

田宜灵;韩铭;陈丽;冯季军;秦颖   

  1. 天津大学化学系,天津　300072
  • 收稿日期:2000-06-26 修回日期:2000-09-30 发布日期:2001-02-15
  • 通讯作者: 田宜灵 E-mail:chem@tju.edu.cn

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 E-mail:chem@tju.edu.cn

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摘要： 在带有可视石英窗的可变体积高压釜内,在60－180 ℃温度范围、 4.0－14.5 MPa压力范围下测定了CO2和乙醇二元系统的相平衡数据.根据实验结果预测了pc,Tc,xc.用PengRobinson方程和WongSandler混合规则进行了拟合,所得结果与实验数据基本相符.

关键词: 高压相平衡, CO2, 乙醇, Peng-Robinson状态方程

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,