Using data for excess Gibbs energy, gE, and enthalpy of mixing, hE, temperature-dependent parameters of the NRTL and UNIQUAC models have been estimated for 44 systems of binary mixtures. Thirty-three of them include data for gE and hE at more than one different isotherm. The estimated parameters were later tested by predicting the total pressure, vapor-phase compositions and gE and hE data simultaneously and presenting the effect of temperature on such data. System-dependency of the models, non-uniqueness in the parameters and the possibility of predicting partial miscibility for completely miscible non-ideal mixtures have been investigated.
ASJC Scopus subject areas
- Chemical Engineering(all)
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry