Isobaric vapor–liquid equilibrium data of the binary systems of octane with p, o, m-xylene at 20 kPa

Isobaric vapor–liquid equilibrium (VLE) data were determined at 20 kPa for the three binary mixtures composed of octane + p, o, m-xylene by using a recirculation type still. All the data passed the thermodynamics test and no azeotropic behavior was observed. The experimental results were used as a basis to check the validity of two predictive models, the UNIFAC (DORTMUND) and COSMO-RS. These new VLE data were also correlated with the Wilson, NRTL, and UNIQUAC activity coefficient models.

► We report the VLE data for the systems composed of octane and p-, o-, m-xylene at 20 kPa. ► The VLE data were correlated by the models of Wilson, NRTL, and UNIQUAC. ► The VLE data check the predictive ability of two models: UNIFAC and COSMO-RS models.