High-pressure phase equilibria for binary ethanol system containing supercritical CO2

High-pressure phase behavior of supercritical (SC) CO2+-ethanol system was investigated at 333.2 K, 348.2 K, 353.2 K, 368.2 K, 413.2 K and 453.2 K and pressure from 2.0 MPa to 14.3 MPa. The measurement was carried out in a cy lindrical autoclave with a moveable piston and a window for adjustment and observation of phase equilibria at given T and p. The samples were taken fr om two coexisting phases and were analyzed to obtain their compositions. It is shown that the solubility of SC CO2 in ethanol increases drastically wi th pressures at the given temperature, but the content of ethanol in CO2-ri ch phase increase faintly.