High pressure phase equilibrium for ethane+1-propanol at 314.15 K

Phase equilibria and saturated densities for ethane + 1-propanol at high pr essures were measured at 314.15 K with a static-circulation apparatus. The experimental apparatus equipped with three Anton Paar DAU 512S vibrating tu be density meters was previously developed for measuring vapor-liquid-liqui d phase separation properties at high pressures. The coexisting phase compo sition 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, resp ectively. For the above system, Suzuki et al. previously reported vapor-liq uid equilibria. Lam et al. previously reported only vapor-liquid-liquid loc us and their saturated density. There are considerable differences between the results of Suzuki et al. and those of Lam et al. The present experiment al results include vapor-liquid equilibria, liquid-liquid equilibria, and v apor-liquid-liquid equilibria. The equilibrium composition and density of e ach phase were determined by gas chromatography and density measurements, r espectively. The experimental data were correlated with various equations o f state.