Phase Behaviour, Interactions, and Structural Studies of (Amines+Ionic Liquids) Binary Mixtures

Johan Jacquemin*, Magdalena Bendová, Zuzana Sedláková, Marijana Blesic, John D. Holbrey, Claire L. Mullan, Tristan G. A. Youngs, Laure Pison, Zdeněk Wagner, Karel Aim, Margarida F. Costa Gomes, Christopher Hardacre

*Corresponding author for this work

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

We present a study on the phase equilibrium behaviour of binary mixtures containing two 1-alkyl-3-methylimidazolium bis{(trifluoromethyl)sulfonyl}imide-based ionic liquids, [Cnmim] [NTf2] (n=2 and 4), mixed with diethylamine or triethylamine as a function of temperature and composition using different experimental techniques. Based on this work, two systems showing an LCST and one system with a possible hourglass shape are measured. Their phase behaviours are then correlated and predicted by using Flory–Huggins equations and the UNIQUAC method implemented in Aspen. The potential of the COSMO-RS methodology to predict the phase equilibria was also tested for the binary systems studied. However, this methodology is unable to predict the trends obtained experimentally, limiting its use for systems involving amines in ionic liquids. The liquid-state structure of the binary mixture ([C2mim] [NTf2]+diethylamine) is also investigated by molecular dynamics simulation and neutron diffraction. Finally, the absorption of gaseous ethane by the ([C2mim][NTf2]+diethylamine) binary mixture is determined and compared with that observed in the pure solvents.
Original languageEnglish
Pages (from-to)1825-1835
Number of pages11
JournalChemPhysChem
Volume13
Issue number7
DOIs
Publication statusPublished - 14 May 2012

Keywords

  • AQUEOUS-SOLUTIONS
  • SYSTEMS
  • SOLUTION TEMPERATURE BEHAVIOR
  • structure
  • COSMO-RS
  • PREDICTION
  • EQUILIBRIA
  • CARBON-DIOXIDE
  • amines
  • WATER
  • phase equilibria
  • ionic liquids
  • THERMODYNAMIC PROPERTIES
  • VOLUMETRIC METHOD
  • interactions

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Atomic and Molecular Physics, and Optics

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