Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

Isothermal vapor-liquid equilibrium (VLE) data were measured for the systems of butan-2-one (1) + 2-methyl-propan-1-ol (2)/ pentan-1-ol (2) using a dynamic low-pressure apparatus. Measurements were undertaken at approximately (333, 343 and 348) K. The VLE data were correlated by minimizing the pressure residual using the combined method with the Wilson, NRTL and UNIQUAC activity coefficient models for the liquid phase non-ideality, with the virial equation of state with the Hayden and O'Connell correlation for the vapor phase nonideality. The Wilson model provided a marginally superior fit of the VLE data than the NRTL and UNIQUAC models. The thermodynamic consistency of the data was tested, and it was found that all data sets were thermodynamically consistent according to the Area and Point tests. Excess enthalpies were calculated from the modelled VLE data and were extrapolated to conditions of experimental data from the literature and a good correlation was found.