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Evaluation of 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide ionic liquid as novel absorbent of 2,2,2-trifluoroethanol or ethanol refrigerants.

Number: pap. ID: 841

Author(s) : CURRÁS M. R., COSTA GOMES M. F., HUSSON P., et al.

Summary

In this work the ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide, [bmim][NTf2], was evaluated as a novel absorbent of two alcohols, used as possible refrigerants to replace classical absorbent-refrigerant pairs: one of the alcohols is fluorinated (2,2,2-trifluoroethanol, TFE) and the other not (ethanol, EtOH). Two thermophysical properties were measured: mixing enthalpies at 298.15 K and 323.15 K and densities in the (288.15 – 333.15 K) temperature range, at atmospheric pressure. Thermal expansion coefficients and excess molar volumes were calculated from density data. Mixing enthalpies in both systems are positive, being smaller for [bmim][NTf2] + TFE than for [bmim][NTf2] + EtOH, a difference that can be explained by the stronger interactions of the fluorinated alcohol with the ionic liquid.

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Details

  • Original title: Evaluation of 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide ionic liquid as novel absorbent of 2,2,2-trifluoroethanol or ethanol refrigerants.
  • Record ID : 30001825
  • Languages: English
  • Source: Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
  • Publication date: 2011/08/21

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