Abstract
A new apparatus has been designed and constructed in order to obtain reliable high-pressure vapor-liquid equilibrium data for binary systems. The vapor-liquid equilibrium phase compositions of the ethylene-propylene system were measured at 283.15 K, 298.15 K, 323.15 K and 348.15 K under pressures ranging from the vapor pressure of propylene (0.78-3.38 MPa) to the critical pressure of the mixture (5.00-5.57 MPa).
Simple consistency tests were applied to both vapor and liquid compositions. Their results show the reliability of the experimental data obtained in this work.
Three equations of state are used to predict the vapor-liquid equilibrium relationships of this system. Calculated values are compared with the data obtained in the present measurements. The calculated results agree well with the experimental results except near the critical region.
