Simultaneous presentation of VLE, H-E and c(p)(E) by the PRSV equation of state with the modified van der Waals one-fluid and Huron-Vidal-Orbey-Sandler mixing rules
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The Stryjek-Vera modification of the Peng-Robinson equation of state with two parameter van der Waals one-fluid mixing rule suggested by Schwartzentruber and Renon (SR) and the Orbey-Sandler modification of the Huron-Vidal mixing rule (HVOS) was applied for simultaneous description of vapor-liquid equilibrium (VLE), excess enthalpy (H-E) and excess heat capacity (c(p)(E)) data (VLE + H-E, H-E + C-p(E) VLE + c(p)(E) and VLE + HE + CpE). The HVOS mixing rule coupled with the NRTL equation using the temperature dependent parameters with six optimized coefficients gave mostly satisfactory results for simultaneous fitting of VLE + HE, VLE + c(p)(E), H-E + C-p(E) and VLE + H-E + c(p)(E) data of the non-ideal binary systems diverse complexity.
Keywords:method of calculation / equation of state / excess function / heat capacity / enthalpy / vapor-liquid equilibria / mixture
Source:Fluid Phase Equilibria, 1999, 155, 2, 205-218
- Elsevier, Amsterdam