Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Influence of water on the carbon dioxide absorption by 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide

Husson, P.[Pascale], Pison, L.[Laure], Jacquemin, J.[Johan], Costa Gomes, M. F.[Margarida F.]
Fluid Phase Equilib. 2010, 294, 1-2, 98-104
ABSTRACT
The effect of the addition of water on the absorption of carbon dioxide by the ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide was studied experimentally by measuring the low-pressure carbon dioxide solubility and the viscosity of the liquid solvent at temperatures from 303 to 323 K. Water is only partially miscible with the ionic liquid up to a mole fraction of 0.302 at 293 K, 0.321 at 303 K and 0.381 at 323 K. It was observed that the solubility of carbon dioxide decreases with the quantity of water from a mole fraction of 2.63 * 10-2 for the pure ionic liquid at 303.4 K to a value of 1.88 * 10-2, a reduction of 30% of the solubility, for a mole fraction of water of 0.28. The viscosity of the liquid solvent also decreases, up to 40% at 303 K, from 28.6 mPa s for the pure ionic liquid to 16.4 mPa s for a water mole fraction of 0.302.
Compounds
# Formula Name
1 C8H11F6N3O4S2 1-ethyl-3-methylimidazolium bis((trifluoromethyl)sulfonyl)imide
2 H2O water
3 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
  • 2
  • 1
  • Viscosity, Pa*s ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 2; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Falling or rolling sphere viscometry
  • 8
  • POMD
  • 2
  • 1
  • Vapor or sublimation pressure, kPa ; Gas
  • Temperature, K; Gas
  • Mole fraction - 2; Liquid
  • Gas
  • Liquid
  • Closed cell (Static) method
  • 17
  • POMD
  • 2
  • 1
  • Vapor or sublimation pressure, kPa ; Gas
  • Temperature, K; Liquid
  • Mole fraction - 2; Liquid
  • Gas
  • Liquid
  • Closed cell (Static) method
  • 14
  • POMD
  • 3
  • 2
  • 1
  • Vapor or sublimation pressure, kPa ; Gas
  • Temperature, K; Liquid
  • Mole fraction - 2; Liquid
  • Pressure, kPa - 3; Gas
  • Gas
  • Liquid
  • Closed cell (Static) method
  • 14
  • POMD
  • 3
  • 2
  • 1
  • Mole fraction - 3 ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 2; Liquid
  • Pressure, kPa - 3; Gas
  • Liquid
  • Gas
  • Calculated from pVT measurements
  • 14