As an important chemical material and alternative fuel, isopropanol has been extensively employed in numerous industries, and its thermodynamic properties are fundamental for process optimization. In this study, experimental measurements of vapor pvT properties were performed by using the Burnett method at temperatures from (473.15 to 573.15) K and pressures up to 7659.59 kPa. A truncated virial equation of state (EoS) was developed using vapor densities with an average absolute deviation of 0.189%, which was utilized to compare with the available data and second virial coefficients in the literature. Furthermore, the isobaric heat capacities covering the single-phase vapor and liquid regions were investigated by using a flow calorimeter in the temperature range of (298.15 to 573.15) K and at pressures of up to 15.03 MPa. The experimental data of the isobaric heat capacity were represented by an empirical correlation with maximum absolute and average absolute deviations of 1.89 and 0.43%, respectively. Based on the available data sets from this work and the literature, a thermodynamic model of isopropanol was established using the PC-SAFT EoS combined with the 2B scheme over a wide temperature and pressure range. It can accurately calculate the vapor pressure, single-phase densities, and isobaric heat capacities with average absolute deviations of 1.22, 0.55, 1.83, 2.29, and 3.99%, respectively.
Yang et al. (Thu,) studied this question.