Abstract
Isothermal vapor-liquid equilibrium data of propylene oxide-ethylene and ethyl ether-ethylene systems were measured by a static method at 25°C and 40°C. The consistency of experimental results is examined by an enhancement factor of the vapor phase and by the Henry constant (f2/x2) of the liquid phase.
By use of the Lewis fugacity rule for ethylene in the vapor phase, the activity coefficients of liquid phase and the fugacity coefficients of vapor phase are evaluated from themodynamic relationships.
The P-x-y data of both systems are correlated with the Redlich-Kwong equation modified by Soave and the perturbation equation proposed by Gubbins and Twu. In the normal probability plot of the residuals, the SRK equation gives better correlation results for both systems.
