Novel pyrrolidinium-based polymeric ionic liquids with cyano counter-anions: High performance membrane materials for post-combustion CO2 separation
authors Tome, LC; Isik, M; Freire, CSR; Mecerreyes, D; Marrucho, IM
nationality International
journal JOURNAL OF MEMBRANE SCIENCE
author keywords Polymeric ionic liquids; Ionic liquids; Composites; Membrane forming ability; Gas permeation
keywords OF-THE-ART; GAS SEPARATION; POLY(IONIC LIQUID)S; CARBON-DIOXIDE; COMPOSITE MEMBRANES; TRANSPORT-PROPERTIES; GEL MEMBRANES; FLUE-GAS; TEMPERATURE; SOLUBILITY
abstract Polymeric ionic liquids (PlLs) are blossoming as a nevv generation of materials aL the interface of many areas leading to a renaissance of the field of ionic polymers. Although PlLs are interesting membranes materials for CO2 separation, additional research is still required to realize their full potential. In this work, pyrroliclinium-based polymers containing different cyano-functionalized counter -anions were synthesized by straightforvvarcl anion exchange reactions and characterized. Their film forming ability blended with different amounts of free ionic liquid (IL) was evaluated and the CO2 and N-2 permeation properties through the prepared composites were determined. The results show that increasing the IL content in the composites not only increased CO2 permeability but also boosted the CO2/N-2 permselectivity, leading to improved separation performances. The best performance was achieved for the C(CN)(3)-based membrane containing 60 wt% of IL, which overcomes the Robeson 2008 upper bound, with CO2 permeability of 439.3 Bat rer and CO2/N-2 permselectivity of 64.4. Therefore, the pyrrolidinium-based PIL combined with the [C(CN)(3)](-) as counter-anion has potential for efficient post-combustion CO2 separation, suggesting the preparation of high performance membranes for industrial applications. (C) 2015 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 0376-7388
year published 2015
volume 483
beginning page 155
ending page 165
digital object identifier (doi) 10.1016/j.memsci.2015.02.020
web of science category Engineering, Chemical; Polymer Science
subject category Engineering; Polymer Science
unique article identifier WOS:000352422100015
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journal impact factor 7.183
5 year journal impact factor 7.158
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