Vapor-liquid and vapor-liquid-liquid equilibrium measurements and correlation of the binary mixtures 2,3,3,3-tetrafluoroprop-1-ene (R1234yf)?+?(tetrafluoromethane (R14), trifluoromethane (R23), octafluoropropane (R218), nitrogen (R728) and argon (R740)) and ethane (R170)?+?trifluoromethane (R23)

摘要

Abstract Vapor-liquid equilibrium data for mixtures R14?+?R1234yf, R23?+?R1234yf, R218?+?R1234yf, R728?+?R1234yf, R740?+?R1234yf and R170?+?R23 were measured in the temperature range of 153 … 273?K and at pressures up to 5?MPa. Vapor-liquid-liquid equilibrium of R170?+?R23 is reported below the upper critical solution temperature of 186?K. The measurements were performed with a vapor recirculation apparatus. Azeotropic behavior was found for R218?+?R1234yf and R170?+?R23. The experimental data were correlated together with existing data from literature, using a modified Peng-Robinson equation of state. The results will be used for the design of low-temperature mixed refrigerant cycles with R1234yf mixtures. ]]>