HIGH-PRESSURE VAPOR-LIQUID-EQUILIBRIA IN THE SYSTEMS CARBON-DIOXIDE PLUS 2-BUTANOL, PLUS 2-BUTYL ACETATE, PLUS VINYL-ACETATE AND CALCULATIONS WITH 3 EOS METHODS

Bubble-point and some dew-point pressures and vapour-liquid critical p oints of the binary systems carbon dioxide + 2-butanol, carbon dioxide + vinyl acetate and carbon dioxide + 2-butyl acetate were measured in the temperature range of 278-520 K up to 15 MPa in a high-pressure ca pillary glass tube apparatus, using the synthetic method. For the syst em [(l-x) CO2+(x) 2-butanol] data of the three-phase line L2L1V for x = 0.1495 are given for a temperature range of 249-252 K. The UCEP ( L2 L1, = V) is found at P = 1.787 MPa and T = 251.39 K. Modelling of the VLE of the three binary systems has been performed using the Stryjek-V era modification of the Peng-Robinson EOS with both the van der Waals one fluid mixing rules (PRSV) and the Wong-Sandler mixing rules (PRSV/ WS) and using the translated modified PR EOS with the linear combinati on of Vidal and Michelsen mixing rules, the LCVM model, using both a S oave type expression and Mathias-Copeman equation for the temperature dependence of the attractive term in the t-mPR EOS. The APACT EOS has only been applied to the system with 2-butanol. (C) 1997 Elsevier Scie nce B.V.