Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

Novel experimental data of density for mixtures containing CO2+ethanol, CO2+ethyl lactate, CO2+glycerol+ethanol and CO2+glycerol+ethyl lactate at low/moderate temperatures (308 and 323 K), pressure between 5 and 30 MPa, and high amounts of the organic solvent (molar fraction x = 0.5 to 0.9) are presented. The chosen organic solvents (ethanol, ethyl lactate and glycerol) are green, applicable in food industry and present different polarizability. The density of CO2+ethanol increased with the increment in the molar fraction of CO2 and the opposite was observed for the mixtures of CO2+ethyl lactate. By adding a small amount of glycerol to the mixture of CO2+ethanol and CO2+ethyl lactate, it was possible to increase the density even a little further. The experimental data of density were well correlated using PREOS combined with Peneloux volume translation.