Fluid phase equilibria of binary and ternary mixtures of supercritical carbon dioxide with low-volatility organic substances up to 100 MPa and 393 K: c

Abstract

Kordikowski, A. and Schneider, G.M., 1993. Fluid phase equilibria of binary and ternary mixtures of supercritical carbon dioxide with low-volatility organic substances up to 100 MPa and 393 K: Cosolvency effects and miscibility windows. Fluid Phase Equilibria 90: 149-162. Isothermal p( w) diagrams at 353.2 and 393.2 K as well as isobaric T( w) diagrams at 25 MPa were determined for binary mixtures of CO 2 with 1-dodecanol and the n-alkanes hexadecane nonadecane, eicosane and tetracosane. In addition measurements were taken for the ternary systems CO 2 + n-alkane + 1-dodecanol (where n-alkane = hexadecane, nonadecane, eicosane or tetracosane) under the same conditions of temperature and pressure. For the system CO 2 + nonadecane + 1-dodecanol additional experiments were carried out at 308.2 K. The resulting ternary critical curves exhibit ‘cosolvency effects’ and ‘miscibility windows.’