Thermodynamics Research Center, ThermoML : Journal of Chemical and Engineering Data

Solubility of Phenylphosphinic Acid in Supercritical Carbon Dioxide and the Influence of Methanol on the Solubility Behavior

John, D.[Deepitha], Kancharlapalli, C. P.[Chinaraga Pitchaiah], Nagarajan, S.[Sivaraman]
J. Chem. Eng. Data 2019, 64, 12, 5775-5784
ABSTRACT
The solubility of phenylphosphinic acid (PPA) was measured for the first time in supercritical carbon dioxide (SCCO2) at 313, 323 & 333 K with pressure ranging from 10-20 MPa using a dynamic flow technique. The solubility of PPA in neat SCCO2 ranged from 0.1x10-5 to 18x10-5 mol/mole. The influence of co-solvent, methanol on solubility behavior was studied by measuring the solubility of PPA in SCCO2 + methanol medium (1 and 4 mol% methanol) at 313 & 323 K with pressure varying from 10-20 MPa. The highest solubility of PPA in SCCO2+methanol mixture is 29.4x10-4mol/mole at 313 K and 20 MPa with a methanol composition of 4 mol%. The solubilities in neat SCCO2 were correlated using different semi-empirical equations (Mendez-Teja, Chrastil and Bartle) with an average deviation of less than10%. The solubility in the presence of methanol was correlated with four semi-empirical/empirical models (modified Chrastil, modified Mendez-Teja, Garlapati model and Jouyban equation); among these models, Jouyban model resulted in better correlation with an average deviation of 5%.
Compounds
# Formula Name
1 CO2 carbon dioxide
2 CH4O methanol
3 C6H7O2P phenylphosphinic acid
4 C8H8O3 mandelic acid
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
  • 3
  • 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
  • Chromatography
  • 18
  • POMD
  • 3
  • 1
  • 2
  • Mole fraction - 3 ; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Temperature, K; Fluid (supercritical or subcritical phases)
  • Solvent: Mole fraction - 2; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • Crystal - 3
  • Chromatography
  • 24
  • POMD
  • 4
  • 1
  • Mole fraction - 4 ; 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 - 4
  • Chromatography
  • 8