Thermodynamics Research Center, ThermoML : Fluid Phase Equilibria

Phase equilibrium measurements and thermodynamic modeling of {CO2 + diethyl succinate + cosolvent} systems

Kloc, Amabille Petza, Grilla, Eleni, Capeletto, Claudia A., Papadaki, Maria, Corazza, Marcos L.
Fluid Phase Equilib. 2019, 502, 112285
ABSTRACT
This work reports experimental phase equilibrium data for the binary systems {CO2(1) + diethyl succinate(2)} and {CO2(1) + ethyl acetate(2)}, and for the ternary systems {CO2(1) + diethyl succinate(2) + ethanol(3)} and {CO2(1) + diethyl succinate(2) + ethyl acetate(3)}. The experiments for the binary system {CO2(1) + diethyl succinate(2)} were carried out at temperatures ranging from 308 K to 358 K, and temperatures ranging from 303 K to 343 K for {CO2(1) + ethyl acetate(2)} as well as for all ternary systems. Only vapor-liquid equilibria were observed for all systems. The experimental measurements were carried out in a high-pressure variable-volume view cell containing a movable piston, which allows pressure control inside the cell. Binary and ternary systems were modeled with the Peng-Robinson cubic equation of state with the van der Waals quadratic mixing rule (vdW2). The presence of a cosolvent (ethanol and ethyl acetate) decreased the saturation pressures of either bubble or dew points compared to the binary system CO2 + diethyl succinate, increasing the solubility of diethyl succinate in CO2.
Compounds
# Formula Name
1 CO2 carbon dioxide
2 C2H6O ethanol
3 C4H8O2 ethyl acetate
4 C8H14O4 diethyl butanedioate
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
  • 3
  • Vapor or sublimation pressure, kPa ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 1; Liquid
  • Liquid
  • Gas
  • Phase Equilibration
  • 25
  • POMD
  • 1
  • 4
  • Vapor or sublimation pressure, kPa ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 1; Liquid
  • Liquid
  • Gas
  • Phase Equilibration
  • 37
  • POMD
  • 1
  • 4
  • Vapor or sublimation pressure, kPa ; Gas
  • Temperature, K; Gas
  • Mole fraction - 1; Gas
  • Gas
  • Liquid
  • Phase Equilibration
  • 5
  • POMD
  • 1
  • 4
  • 2
  • Vapor or sublimation pressure, kPa ; Liquid
  • Solvent: Mole fraction - 4; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 1; Liquid
  • Liquid
  • Gas
  • Phase Equilibration
  • 50
  • POMD
  • 1
  • 4
  • 3
  • Vapor or sublimation pressure, kPa ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 1; Liquid
  • Solvent: Mole fraction - 4; Liquid
  • Liquid
  • Gas
  • Phase Equilibration
  • 20