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

ABSTRACT

High pressure, experimental pressure-density-temperature data for the binary systems of propan1-ol (1) + n-octane (2), propan-1-ol (1) + n-nonane (2) and propan-1-ol (1) + n-decane (2) are presented. Measurements were conducted over the entire composition range, in the temperature range of 313.15 K to 363.15 K, from approximately 1 to 20 MPa, by using an Anton Paar DMA HP densitometer and a newly commissioned pressurizing network. The binary experimental density data is correlated by the five-parameter modified Toscani-Szwarc equation of state which demonstrates good correlation of the data. Excess molar volumes for the measured systems were determined as a function of pressure and temperature and were found to be positive for the measurement range considered in this work. Derived property data (thermal expansivity and isothermal compressibility) were also calculated for these systems and were found to be nonlinear in most instances. The effect of temperature and pressure on these properties was also discussed. The non-ideality of the mixture properties was attributed to differences in the size and shape of the molecules and the energetic interactions due to the polarity of the propan-1-ol molecules.