Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Measurement and Correlation for the Solid Solubility of Antioxidants d-Isoascorbic Acid and Calcium l-Ascorbate Dihydrate in Supercritical Carbon Dioxide

Wang, T.-C.[Tzu-Chi], Lee, P.-Y.[Ping-Yen]
J. Chem. Eng. Data 2014, 59, 3, 613-617
ABSTRACT
The central task of this research is devoted to the measurement of the solubility of two antioxidants d-isoascorbic acid and calcium l-ascorbate dihydrate in supercritical carbon dioxide. The experiment, using a semiflow type apparatus, takes data at various temperatures, over pressures ranging from 12 MPa to 24 MPa. The acquired data are then processed numerically with the aid of semiempirical equations proposed by Chrastil and by Mendez-Santiago and Teja to find the correlated relationship. The correlated results from both equations yield satisfactory results with an average absolute relative deviation (AARD) under 5 % when optimally fitted parameters are chosen.
Compounds
# Formula Name
1 C6H8O6 D-isoascorbic acid
2 CO2 carbon dioxide
3 C12H18CaO14 calcium L-ascorbate dihydrate
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
  • Mole fraction - 1 ; 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 - 1
  • solubilty from gas volume and solute amount
  • 21
  • POMD
  • 2
  • 3
  • 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
  • solubilty from gas volume and solute amount
  • 21