In this work, the experimental vapor-liquid equilibria (VLE) for a ternary and a quaternary system was measured in a static analytic apparatus from subcritical up to near critical pressures of the systems. The VLE for the ternary carbon dioxide + ethanol + n-hexane system was determined at (313.66, 342.82 and 372.76) K. VLE for the same components in the presence of thiophene was obtained at (313.11, 343.39 and 373.06) K. Combined uncertainties for the measured properties were estimated to be +-0.008 MPa, +-0.03 K, +-0.0019 mol/mol for the vapor phase and +-0.0038 mol/mol for the liquid phase with respect to carbon dioxide composition. A high selectivity of n-hexane over ethanol and thiophene was obtained in both systems in the presence of carbon dioxide for the studied range of temperature and pressure. The vapor-liquid equilibrium data were correlated with the Peng-Robinson equation of state using the classical mixing rule.
Compounds
#
Formula
Name
1
CO2
carbon dioxide
2
C2H6O
ethanol
3
C6H14
hexane
Datasets
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.