Thermodynamics Research Center / ThermoML | Thermochimica Acta

Solubilities of resorcinol and pyrocathecol and their mixture in supercritical carbon dioxide

Reddy, S. N.[Sivamohan N.], Madras, G.[Giridhar]
Thermochim. Acta 2011, 521, 1-2, 41-8
ABSTRACT
The equilibrium solubilities of dihydroxy benzene isomers (resorcinol and pyrocathecol) and its mixture were experimentally determined at different temperatures (308, 318, 328, and 338 K) in the pressure range of 9.8 to 16.2 MPa. In the ternary system, the solubilities of pyrocathecol increased while the solubilities of resorcinol decreased relative to their binary solubilities. A new association model was developed based on the concept of formation of solvate complex molecules to correlate the solubility of the solid for mixed solids in supercritical carbon dioxide (SCCO2). The model equation relates the solubility of solute in terms of the cosolute composition, temperature, pressure and density of SCCO2. The proposed model correlated the solubilities of sixteen solid systems taken from the literature and current experimental data with an average AARD of around 4%.
Compounds
# Formula Name
1 CO2 carbon dioxide
2 C6H6O2 1,2-benzenediol
3 C6H6O2 1,3-benzenediol
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
  • 2
  • 1
  • Mole fraction - 2 ; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Temperature, K; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • Crystal - 2
  • flow apparatus
  • 8
  • POMD
  • 3
  • 1
  • Mole fraction - 3 ; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Temperature, K; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • Crystal - 3
  • flow apparatus
  • 7
  • POMD
  • 3
  • 2
  • 1
  • Mole fraction - 3 ; Fluid (supercritical or subcritical phases)
  • Temperature, K; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • Crystal - 3
  • Crystal - 2
  • Chromatography
  • 21
  • POMD
  • 3
  • 2
  • 1
  • Mole fraction - 2 ; Fluid (supercritical or subcritical phases)
  • Temperature, K; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • Crystal - 3
  • Crystal - 2
  • Chromatography
  • 21