VAPOR-LIQUID-EQUILIBRIA AND CORRELATIONS OF ETHANOL PLUS CO2 AND ACETONE PLUS CO2 AT ELEVATED PRESSURES

Vapor-liquid equilibria and excess volumes for carbon dioxide+ethanol and carbon dioxide+acetone were determined by a novel technique of den sity measurement at 291, 298, 303, 308, 313K, and pressures up to 14.3 9MPa. Both solubilities of carbon dioxide in ethanol and acetone were found to increase with applied pressure but to decrease with increasin g temperature. Peng-Robinson equation of state and pan der Waals mixin g rule with one adjustable interactional parameter was able to sucessf ully correlate equilibrium data for these two systems. Most excess vol ume in the liquid phase of these two binary mixtures showed negative d eviation from the ideal solution.