High Pressure Phase Equilibrium for Ethane + 1-Propanol at 314.15 K

Abstract

Phase equilibria and saturated densities for ethane + 1-propanol at high pressures were measured at 314.15 K with a static-circulation apparatus. The experimental apparatus equipped with three Anton Paar DMA 512S vibrating tube density meters was previously developed for measuring vapor−liquid−liquid phase separation properties at high pressures. The coexisting phase composition and saturated density of each phase can be measured by means of the apparatus with a maximum temperature and pressure of 400 K and 20 MPa, respectively. For the above system, Suzuki et al. previously reported vapor−liquid equilibria. Lam et al. previously reported only vapor−liquid−liquid locus and their saturated density. There are considerable differences between the results of Suzuki et al. and those of Lam et al. The present experimental results include vapor−liquid equilibria, liquid−liquid equilibria, and vapor−liquid−liquid equilibria. The equilibrium composition and density of each phase were determined by gas chromatography and density measurements, respectively. The experimental data were correlated with various equations of state.