Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

PHASE EQUILIBRIA OF CARBON DIOXIDE + POLY ETHYLENE GLYCOL + WATER MIXTURES AT HIGH PRESSURE: MEASUREMENTS AND MODELLING

Martin, A.[Angel], Pham, H. M.[Huu Minh], Kilzer, A.[Andreas], Weidner, E.[Eckhard], Kareth, S.[Sabine]
Fluid Phase Equilib. 2009, 286, 2, 162-169
ABSTRACT
Phase equilibria of Carbon Dioxide + Poly Ethylene Glycol (PEG) 6000 + water mixtures has been measured by the static method at conditions of interest for the development of Particles from Gas Saturated Solutions (PGSS) drying processes (pressure from 10 MPa to 30 MPa, temperature from 353 K to 393 K). A thermodynamic model based on the Perturbed Chain Statistical Associating Fluid Theory (PC-SAFT) Equation of State has been developed for correlating experimental data. The model is able to predict the composition of the liquid phase with an average deviation of 8.0%. However, the model does not calculate correctly the concentration of PEG in the gas phase. The model is also capable of predicting solid fluid equilibrium of Carbon Dioxide + PEG mixtures at pressures below 10 MPa.
Compounds
# Formula Name
1 CO2 carbon dioxide
2 H2O water
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.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 1
  • 2
  • Vapor or sublimation pressure, kPa ; Liquid
  • Mass fraction - 1; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • Closed cell (Static) method
  • 5
  • POMD
  • 1
  • 2
  • Mass fraction - 1 ; Gas
  • Mass fraction - 1; Liquid
  • Temperature, K; Liquid
  • Gas
  • Liquid
  • volume of gas released upon depressurization
  • 5