Isobaric Vapor–Liquid Equilibrium Data for the Isopropanol–Water System

Abstract

This work presents experimental isobaric vapor−liquid equilibrium data for the isopropanol−water system collected at 150 kPa, 200 kPa, 250 kPa, and 300 kPa at the Process Thermodynamics laboratory (PT lab) of Politecnico di Milano and its representation with the thermodynamic models PSRK, NRTL, UNIFAC, and Wilson. The system is strongly nonideal, with the presence of a minimum boiling azeotrope which was found at all the pressures of analysis. Data at the considered pressures for the system are not available in the literature even though they are of interest for thermodynamic modeling of strongly nonideal mixtures which employ thermodynamic parameters regressed on the basis of experimental points. The reliability of the operation of the experimental unit and of the measurements was checked by determining the vapor pressure curve of the single components and by comparing it with the ones from the literature and also by comparing the collected data for the binary system with those available in the literature at atmospheric pressure. In addition, the test on thermodynamic consistency has been performed for all the collected data.