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

ABSTRACT

Isobaric vapor-liquid equilibrium (VLE) experimental data for camphene+ (+-)-limonene, camphene + (+)-3-carene, (+)-3-carene + (+-)-limonene, and camphene + (+)-3-carene + (+-)-limonene were determined in an improved Ellis still. Furthermore, saturated vapor pressure measurements for camphene across a temperature range of 357.01 to 432.16 K were reported. Additionally, the vapor pressure data, obtained also using an improved Ellis equilibrium still, were fitted by the Antoine equation. The thermodynamic consistency of the VLE values were confirmed by the Herington area and van Ness tests. The VLE data were correlated using the nonrandom two-liquid (NRTL), Wilson and universal quasichemical (UNIQUAC) activity coefficient models with the measurements demonstrating good correlation. Moreover, the corresponding binary interaction parameters of the three models were regressed. The maximum average absolute deviation of temperature (AAD(T)) and maximum average absolute deviation of vapor-phase mole fraction (AAD(y)) are 0.0855 and 0.0013 for the camphene + (+-)-limonene system, 0.0112 and 0.0003 for the camphene + (+)-3-carene system, and 0.0128 and 0.0002 for the (+)-3-carene + (+-)-limonene system, respectively. These models were also used to predict the ternary system VLE data. The predictive results suggested that NRTL model had the best prediction.