HIGH-PRESSURE VAPOR-LIQUID-EQUILIBRIA OF THE TERNARY-SYSTEM CARBON-DIOXIDE PLUS VINYL-ACETATE PLUS 2-BUTANOL - EXPERIMENTAL AND MODELING RESULTS

Bubble-point and dew-point pressures and vapor-liquid critical points of the ternary system (x(1))carbon dioxide +(x(2))vinyl acetate +(x(3) )2-butanol were measured in the temperature range 278-510 K up to 14 h lPa in a high-pressure capillary glass tube apparatus, using the synth etic method. The system has been investigated for varying carbon dioxi de compositions at fixed ratios of vinyl acetate and 2-butanol (x(2)/x (3) = 1/3 and 3/1) and at fixed 2-butanol composition (x(3) = 0.15). M odeling of the vapor-liquid equilibria of the ternary system has been performed using tyro equation of state (EOS) methods: (1) the Stryjek- Vera modification of the Peng-Robinson EOS with the Wong-Sandler mixin g rules (PRSV/WS) implementing the NRTL-G(E) model; (2) the LCVM model , which is the translated modified PR EOS with the linear combination of Vidal and Michelsen mixing rules implementing the UNIFAC-GE model.