Thermodynamics Research Center / ThermoML | Thermochimica Acta

Solubility of CO2 in imidazolium-based tetrafluoroborate ionic liquids

Chen, Y.[Yuhuan], Zhang, S.[Suojiang], Yuan, X.[Xiaoliang], Zhang, Y.[Yanqiang], Zhang, X.[Xiangping], Dai, W.[Wenbin], Mori, R.[Ryohei]
Thermochim. Acta 2006, 441, 1, 42-44
ABSTRACT
The solubility of CO2 in imidazolium ionic liquids (ILs), 1-butyl-3-methyl imidazolium tetrafluoroborate ([bmim][BF4]), 1-hexyl-3-methyl imidazolium tetrafluoroborate ([hmim][BF4]) and 1-octyl-3-methyl imidazolium tetrtafluoroborate ([omim][BF4]) was determined at 305 25K and pressures from 1 to 9MPa. The influence of chain length of alkyl substituents on the imidazolium cation on the solubility of CO2 was investigated. The differences in solubility with chain length are in the sequence [omim][BF4] > [hmim][BF4] > [bmim][BF4]. The solubility data were correlated by the extended Henry s law, and enthalpy, Gibbs free energy and entropy changes were obtained.
Compounds
# Formula Name
1 CO2 carbon dioxide
2 C8H15BF4N2 1-butyl-3-methylimidazolium tetrafluoroborate
3 C10H19BF4N2 1-hexyl-3-methylimidazolium tetrafluoroborate
4 C12H23BF4N2 1-methyl-3-octylimidazolium tetrafluoroborate
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
  • Molality, mol/kg ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Gas
  • Gravimetry
  • 40
  • POMD
  • 1
  • 3
  • Molality, mol/kg ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Gas
  • Gravimetry
  • 44
  • POMD
  • 1
  • 4
  • Molality, mol/kg ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Gas
  • Gravimetry
  • 32