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Synthesis and characterization of Magnetic Ionic Liquids ( MILs ) for CO 2 separation
Author(s) -
Santos Esther,
Albo Jonathan,
Rosatella Andreia,
Afonso Carlos A.M.,
Irabien Ángel
Publication year - 2014
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.4323
Subject(s) - phosphonium , ionic liquid , solubility , thermal stability , thermal decomposition , paramagnetism , viscosity , chemistry , chemical engineering , nuclear chemistry , materials science , polymer chemistry , organic chemistry , catalysis , physics , quantum mechanics , engineering , composite material
BACKGROUND The behaviour of a new generation of Ionic Liquids ( ILs ) containing transition metals, Magnetic Ionic Liquids ( MILs ), has recently been reported in the literature. Due to the early stage of development of MILs , it is necessary to evaluate their properties in order to develop new applications. In this work, four MILs based on the trihexyl(tetradecyl)phosphonium cation and different magnetic anions ([ P 66614 ] 2 [ CoCl 4 ], [ P 66614 ][ FeCl 4 ], [ P 66614 ] 2 [ MnCl 4 ] and [ P 66614 ] 3 [ GdCl 6 ]) were synthesized and characterized by measuring magnetic susceptibility, density, viscosity, thermal properties and carbon dioxide solubility for CO 2 separation.RESULTS The magnetic susceptibility showed a paramagnetic behaviour in all the MILs tested, in good agreement with other MILs reported in the literature. The density and viscosity of MILs were obtained experimentally and correlated using Fitteia software. All MILs studied showed very good thermal stability, with decomposition temperatures higher than 619 K. CO 2 solubility in the MILs was lower than in other ILs reported in the literature for CO 2 capture under the same operational conditions.CONCLUSIONS This work provides further information related to the synthesis and characterization of phosphonium‐based MILs and offers potential for the development of new applications. © 2014 Society of Chemical Industry.