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

Diffusion Coefficients of Isobutylbenzene, sec-Butylbenzene, and 3-Methylbutylbenzene in Supercritical Carbon Dioxide

Pizarro, C.[Consuelo], Suarez-Iglesias, O.[Octavio], Medina, I.[Ignacio], Bueno, J. L.[Julio L.]
J. Chem. Eng. Data 2013, 58, 7, 2001-2007
ABSTRACT
Binary diffusion coefficients of isobutylbenzene, sec-butylbenzene, and 3-methylbutylbenzene (isopentylbenzene) in carbon dioxide were measured at supercritical conditions: temperatures of (313, 323, and 333) K and in a pressure range of (15.0 to 35.0) MPa using the Taylor Aris technique. The dependency on temperature, pressure, carbon dioxide density, and carbon dioxide viscosity was examined. The experimental results were compared with the predictions of 14 semiempirical equations derived from the Stokes Einstein equation (six equations) and from the model of the rough-hard-sphere (eight equations). Despite of the low errors of some of them, none reproduced the trend in which the isomers diffused.
Compounds
# Formula Name
1 C10H14 (1-methylpropyl)benzene
2 C10H14 (2-methylpropyl)benzene
3 C11H16 (3-methylbutyl)benzene
4 CO2 carbon dioxide
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
  • 4
  • 2
  • Binary diffusion coefficient, m2/s ; Fluid (supercritical or subcritical phases)
  • Temperature, K; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Mole fraction - 2; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • Taylor dispersion method
  • 15
  • POMD
  • 4
  • 1
  • Binary diffusion coefficient, m2/s ; Fluid (supercritical or subcritical phases)
  • Temperature, K; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Mole fraction - 1; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • Taylor dispersion method
  • 15
  • POMD
  • 4
  • 3
  • Binary diffusion coefficient, m2/s ; Fluid (supercritical or subcritical phases)
  • Temperature, K; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Mole fraction - 3; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • Taylor dispersion method
  • 15