CROSSOVER LEUNG-GRIFFITHS MODEL AND THE PHASE-BEHAVIOR OF BINARY-MIXTURES WITH AND WITHOUT CHEMICAL-REACTION

A new theoretical crossover model for the phase behavior of binary mix tures is presented that corresponds to the Leung-Griffiths model in th e critical region and is transformed into the regular classical expans ion far away from the critical point. The model is optimized to, and l eads to good agreement with, experimental vapor-liquid equilibrium dat a for CO2 + n-butane, CO2 + propane, ethane + benzene, CO2 + methanol, and dilute aqueous solutions of NaCl in the extended critical region. Phase behavior of mixtures in the presence of chemical reaction and a possibility to incorporate this phenomenon into the model are also di scussed. Published by Elsevier Science B.V.