Phase equilibria of carbon dioxide and tricaprylin

Vapor-liquid equilibrium data were measured in the binary system CO2-trioctanoylglycerol or tricaprylin at 313.2, 353.2 and 393.2 K and pressures ranging from 5.0 to 32.2 MPa using a static-type apparatus. The CO2-tricaprylin system shows increasing solubility with increasing temperature at a fixed pressure, and increasing solubility with increasing pressure at a fixed temperature. For 313.2, 353.2, and 393.2 K, total miscibility of CO, and tricaprylin was obtained at pressures above 14.2, 24.8 and 32.2 MPa, respectively. The critical and three-phase pressures were determined in the temperature range from 286.1-304.7 K at a CO2-tricaprylin ratio of 1:0.40 by weight. (C) 1997 Elsevier Science B.V.