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

Abstract

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

CLC Number:

O642

TrendMD:

ZHU Hu-Gang, TIAN Yi-Ling, CHEN Li, FENG Ji-Jun, FU Hua-Feng . Studies on Vapor-liquid Phase Equilibria for SCF CO₂+CH₃OH and SCF CO₂+C₂H₅OH Systems[J]. Chem. J. Chinese Universities, 2002, 23(8): 1588.

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

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