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Issue
Korean Journal of Chemical Engineering,
Vol.30, No.2, 474-481, 2013
Solubility of carbon dioxide in ammonium-based ionic liquids: Butyltrimethylammonium bis(trifluoromethylsulfonyl)imide and methyltrioctylammonium bis(trifluoromethylsulfonyl)imide
Nam SG, Lee BC
Solubility results of carbon dioxide (CO2) in two ammonium-based ionic liquids, butyltrimethylammonium bis(trifluoromethylsulfonyl)imide ([N4,1,1,1][Tf2N]) and methyltrioctylammonium bis(trifluoromethylsulfonyl)imide ([N1,8,8,8][Tf2N]), are presented at pressures up to approximately 45 MPa and temperatures ranging from 303.15 K to 343.15 K. The solubility was determined by measuring bubble point pressures of mixtures of CO2 and ionic liquid using a high-pressure equilibrium apparatus equipped with a variable-volume view cell. Sharp increase of equilibrium pressure was observed at high CO2 compositions. The CO2 solubility in ionic liquids increased with the increase of the total length of alkyl chains attached to the ammonium cation of the ionic liquids. The experimental data for the CO2+ionic liquid systems were correlated using the Peng-Robinson equation of state.
Keywords: Solubility; Carbon Dioxide; Ionic Liquid; Ammonium; Correlation; Peng-Robinson Equation of State
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[Cited By]
  1. Lee BC, Nam SG, Korean Journal of Chemical Engineering, 32(3), 521, 2015
  2. Kim JE, Kang JW, Lim JS, Korean Journal of Chemical Engineering, 32(8), 1678, 2015
  3. Choi YS, Chio SW, Byun HS, Korean Journal of Chemical Engineering, 33(1), 277, 2016
  4. Lee BC, Korean Chemical Engineering Research, 54(2), 213, 2016
  5. Lee EJ, Yoo JD, Lee BC, Korean Chemical Engineering Research, 55(2), 230, 2017
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