Journal of Supercritical Fluids, Vol.55, No.1, 32-36, 2010
High-pressure phase equilibria for the binary system carbon dioxide plus benzyl alcohol
The phase equilibria of the carbon dioxide + benzyl alcohol system were measured at 298.15, 306.35 and 313.15 K, under pressures from 1.03 to 16.15 MPa. An upper critical end point (UCEP) of the binary system was identified at 307.45 K and 7.77 MPa and three-phase equilibria were observed along the liquid-liquid-vapor (LLV) equilibrium line between 279.75 and 307.45 K. The experimental data were correlated well by the Peng-Robinson equation of state with two binary parameters. According to the experimental results, the phase behavior of the carbon dioxide + benzyl alcohol system appears to belong to Type-Ill according to the classification of van Konynenburg and Scott. (C) 2010 Elsevier B.V. All rights reserved.