Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Effect of the pressure on the viscosities of ionic liquids: Experimental values for 1-ethyl-3-methylimidazolium ethylsulfate and two bis(trifluoromethyl-sulfonyl) imide salts

Gacino, F. M.[Felix M.], Paredes, X.[Xavier], Comunas, M. J. P.[Maria J.P.], Fernandez, J.[Josefa]
J. Chem. Thermodyn. 2012, 54, 302-309
ABSTRACT
A new falling-body viscometer has been implemented to measure viscosity of liquids in a temperature range from (313.15 to 363.15) K at pressures up to 150 MPa. The accuracy of the viscometer was verified after comparing experimental results of squalane with previous literature data finding an average absolute deviation lower than 1.5%. With this device, we have measured viscosity values for three ionic liquids: 1-ethyl-3-methylimidazolium ethylsulfate, 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide and 1-(2-methoxyethyl)-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide within the temperature and pressure ranges noted above. The experimental values were correlated as a function of temperature and pressure with four different equations. In addition, we have analysed the pressure viscosity derived properties for these fluids and for other five ionic liquids using literature values.
Compounds
# Formula Name
1 C8H16N2O4S 1-ethyl-3-methylimidazolium ethyl sulfate
2 C11H20F6N2O4S2 1-butyl-1-methylpyrrolidinium bis[(trifluoromethyl)sulfonyl]imide
3 C10H18F6N2O5S2 1-(2-methoxyethyl)-1-methylpyrrolidinium bis((trifluoromethyl)sulfonyl)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
  • Viscosity, Pa*s ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Falling or rolling sphere viscometry
  • 24
  • POMD
  • 2
  • Viscosity, Pa*s ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Falling or rolling sphere viscometry
  • 24
  • POMD
  • 3
  • Viscosity, Pa*s ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Falling or rolling sphere viscometry
  • 24