Phase behavior of CO2/toluene, CO2/n-decane and CO2/toluene/n-decane: Experimental measurements and thermodynamic modeling with SAFT-VR Mie equation of state

Abstract

Experimental phase behavior data are reported for binary systems CO2/toluene and CO2/n-decane and for ternary system CO2/toluene/n-decane at (313.2 and 353.2) K with carbon dioxide composition ranging from 0.2 to 0.8 mole fraction. The equilibrium data for the binary systems were used to estimate the cross interactions parameters of the SAFT-VR Mie equation of state. The SAFT-VR Mie model correlated the temperature and composition effect on the bubble pressure with deviations close to the experimental uncertainty and lower than the ones obtained with the PC-SAFT model. The binary interaction parameters were used to calculate the bubble pressure of the ternary mixture, and the deviations are compatible to those of binary systems, confirming that SAFT-VR Mie is very useful to correlate thermodynamic properties of binary and ternary systems and promising to predict multicomponent systems properties with low deviations.