Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

ABSTRACT

An apparatus based on a static-analytic method assembled in this work was utilized to perform high pressure (vapour + liquid) equilibria measurements with uncertainties estimated at less than 5%. Complementary isothermal (vapour + liquid) equilibria results are reported for the (CO2 + 1-propanol), (CO2 + 2-methyl-1- propanol), (CO2 + 3-methyl-1-butanol), and (CO2 + 1-pentanol) binary systems at temperatures of (313, 323, and 333) K, and at pressure range of (2 to 12) MPa. For all the (CO2 + alcohol) systems, it was visually monitored to insure that there was no liquid immiscibility at the temperatures and pressures studied. The experimental results were correlated with the Peng Robinson equation of state using the quadratic mixing rules of van der Waals with two adjustable parameters. The calculated (vapour + liquid) equilibria compositions were found to be in good agreement with the experimental values with deviations for the mol fractions less than0.12 and less than0.05 for the liquid and vapour phase, respectively.