高等学校化学学报

高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (8): 1588.

• 研究论文 • 上一篇    下一篇

超临界CO2+CH3OH及C2H5OH二元系的气液平衡

朱虎刚, 田宜灵, 陈丽, 冯季军, 付华锋   

  1. 天津大学化学系, 天津 300072
  • 收稿日期:2000-06-28 出版日期:2002-08-24 发布日期:2002-08-24
  • 作者简介:田宜灵(1946年出生),男,教授,从事高压相平衡和超临界流体性质及应用研究.

Studies on Vapor-liquid Phase Equilibria for SCF CO2+CH3OH and SCF CO2+C2H5OH Systems

ZHU Hu-Gang, TIAN Yi-Ling, CHEN Li, FENG Ji-Jun, FU Hua-Feng   

  1. Department of Chemistry, Tianjin University, Tianjin 300072, China
  • Received:2000-06-28 Online:2002-08-24 Published:2002-08-24

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摘要： 在带有石英可视窗和内搅拌的可变体积高压釜内,测定了超临界CO2+CH3OH及C2H5OH两个系统的相平衡数据,温度为50～200℃,压力4.0～16.0MPa.利用从硬球模型得出的适用于高压高温的状态方程,计算了这两个系统的临界曲线,并与实验值进行比较.

关键词: 相平衡, 甲醇, 乙醇, 超临界, 二元混合物, 状态方程

Abstract: Vapor liquid equilibrium data for SCF CO2+ methanol mixtures at 50, 100, 150 and 200 ℃ and for SCF CO2+ ethanol mixtures at 60, 80, 140 and 180 ℃ have been measured. The pressure in the experiments ranged from 4.0 to 16.2 MPa. The measurements were carried out in a cylindrical autoclave with a moveable piston and a window for observation. The results of compositions of the two coexisting phases are given and shown as p x diagrams. We have correlated phase equilibrium data with the equation of state(a repulsion term, Carnahan Starling One Fluid, an attraction term, Square Well Pade Approximant). The calculated results agree fairly with the experimental data.

Key words: Phase equilibrium, Methanol, Ethanol, Supercritical fluid, Binary mixture, Equation of state

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