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Phase Behaviour, Interactions, and Structural Studies of (Amines+Ionic Liquids) Binary Mixtures
Author(s) -
Jacquemin Johan,
Bendová Magdalena,
Sedláková Zuzana,
Blesic Marijana,
Holbrey John D.,
Mullan Claire L.,
Youngs Tristan G. A.,
Pison Laure,
Wagner Zdeněk,
Aim Karel,
Gomes Margarida F. Costa,
Hardacre Christopher
Publication year - 2012
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201100952
Subject(s) - diethylamine , ionic liquid , chemistry , thermodynamics , uniquac , triethylamine , imide , phase (matter) , binary system , binary number , organic chemistry , activity coefficient , non random two liquid model , aqueous solution , physics , arithmetic , mathematics , catalysis
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, [C n mim] [NTf 2 ] ( 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 ([C 2 mim] [NTf 2 ]+diethylamine) is also investigated by molecular dynamics simulation and neutron diffraction. Finally, the absorption of gaseous ethane by the ([C 2 mim][NTf 2 ]+diethylamine) binary mixture is determined and compared with that observed in the pure solvents.