Phase equilibria of the ternary system methyl oleate/squalene/carbon dioxide at high pressure conditions

Abstract

Vapor–liquid equilibrium data are reported for the ternary system methyl oleate–squalene–carbon dioxide in the temperature range of 313–343 K and in the pressure range of 11–21 MPa. Experiments were performed in a continuous-type equilibrium apparatus by using a static mixer ensemble to promote the equilibrium between the gas and liquid phases. High selectivity of carbon dioxide towards methyl oleate was obtained. Equilibrium data were correlated using the Soave–Redlich–Kwong equation of state with the Mathias–Klotz–Prausnitz mixing rule. The binary interaction parameters were optimized by minimizing the deviations between the calculated and experimentally determined vapor and liquid phase compositions and distribution coefficients of each substance. A fairly good correlation of the data could be obtained with an average absolute deviation (AAD) of 1.3×10 −2.