| 초록 |
Many mixtures of interest in the chemical industry exhibit strong nonideality,greater than that describable by regular solution theory. Models for describing andpredicting the phase behaviour have been continuously developed. Among many models,a very attractive route for developing better mixing rules is to combine an EOS withactivity coefficient models. In this study, we measured isothermal vapor-liquid equilibriafor binary systems of 1, 1, 1, 2, 3, 3-Hexafluoropropane (HFC-227ea) + iso-butane at 303.15,313.15 and 323.15 K. The experimental data were correlated with six mixing rulescombined with the Peng-Robinson-Stryjek-Vera equation of state and the NRTL excessfree 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), HVOS(Huron Vidal modifiedby Orbey and Sandler), WS(Wong-Sandler) models and the NRTL parameters obtainedby these mixing rules were presented.
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