Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Density and isothermal compressibility for two trialkylimidazolium-based ionic liquids at temperatures from (278 to 398) K and up to 120 MPa

Gacino, F. M.[Felix M.], Regueira, T.[Teresa], Comunas, M. J. P.[Maria J.P.], Lugo, L.[Luis], Fernandez, J.[Josefa]
J. Chem. Thermodyn. 2015, 81, 124-130
ABSTRACT
In this paper, a densimeter based on vibrating tube principle is used to determine experimentally the density of 1-butyl-2,3-dimethylimidazolium tris(pentafluoroethyl)trifluorophosphate and 1-butyl-2, 3-dimethylimidazolium bis(trifluoromethylsulfonyl)imide at temperatures between (278.15 and 398.15) K and at pressures up to 120 MPa. The apparatus was calibrated by using water, vacuum and bromobenzene. The Tammann Tait equation of state was used to correlate (p,T,q) results with standard deviations around 2 10 4 g cm 3. Other volumetric properties, such as isothermal compressibility and isobaric thermal expansivity, were obtained fromthis equation. For each ionic liquid, the ap isotherms present a crossing point within the experimental pressure range. Besides, the effect that the C2-methylation in the imidazolium cation provokes on density values is analyzed. The prediction ability of the group contribution methods of Gardas and Coutinho and Jacquemin et al. were tested with the experimental densities.
Compounds
# Formula Name
1 C15H17F18N2P 1-butyl-2,3-dimethyl-1H-imidazolium trifluorotris(perfluoroethyl)phosphate(V)
2 C11H17F6N3O4S2 1-butyl-2,3-dimethyl-1H-imidazolium bis(trifluoromethylsulfonyl)amide
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
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vibrating tube method
  • 63
  • POMD
  • 2
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vibrating tube method
  • 63