| 초록 |
Many mixtures of interest in the chemical industry exhibit strong nonideality, greater than that describable by regular solution theory. Models for describing and predicting the phase behaviour have been continuously developed. Among many models, a very attractive route for developing better mixing rules is to combine an EOS with activity coefficient models.[2] In this study, we measured isothermal vapor-liquid equilibria for binary systems of 1,1,1,2-tetrafluoroethane(HFC-134a)+propane at 293.15, and 303.15 K. The experimental data were correlated with five mixing rules combined with the Peng- Robinson-Stryjek-Vera equation of state and the NRTL excess free energy model. These mixing rules are HV-O(Huron Vidal-Original), MHV1(Modified Huron-Vidal 1st order), MHV2(Modified Huron Vidal 2nd order), LCVM(Linear Combination of Huron Vidal and michelsen), and HVOS(Huron Vidal modified by Orbey and Sandler) models[1] and the NRTL parameters obtained by these mixing rules were presented. |
