High-pressure vapor-liquid equilibrium phase properties of the octafluoropropane (K-218)-chlorodifluoromethane (Freon-22) binary system

Vapor and liquid equilibrium phase compositions were determined at 50, 60, 70, and 75 o C for the octafluoropropane-chlorodifluoromethane system. Measurements were made at pressures from the vapor pressure of the two pure components to the higher of the azeotropic or critical pressure for the binary systems at each temperature. The equilibrium ratios for each component were calculated at each temperature from the phase composition data