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Effect of anion on gas separation performance of polymer−room-temperature Ionic liquid composite membranes in Industrial & engineering chemistry research, Vol. 47 n°24 (Décembre 2008)
Effect of anion on gas separation performance of polymer−room-temperature Ionic liquid composite membranes [texte imprimé] / Jason E. Bara, Auteur ; Douglas L. Gin, Auteur ; Richard D. Noble, Auteur . - 2009 . - p. 9919–9924.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 47 n°24 (Décembre 2008) . - p. 9919–9924
Mots-clés : Gas Separation Performance of Polymer photopolymerization Résumé : Composite gas separation membranes were fabricated by photopolymerization of a room-temperature ionic liquid (RTIL) monomer in the presence of 20 mol % of nonpolymerizable RTILs with various anions. The solid, composite membranes contained polymer-bound cations, “free” cations, and “free” anions. The composite materials exhibit no phase separation between these components. The permeabilities of CO2, N2, and CH4 in these poly(RTIL)−RTIL composites were observed to increase by 2−5 times relative to those in the neat poly(RTIL) without a “free” RTIL component. These largely increased permeabilities resulted in CO2/N2 and CO2/CH4 ideal separation selectivities that were only slightly diminished relative to the poly(RTIL) without a “free” RTIL. When viewed on “Robeson plots”, poly(RTIL)−RTIL composites are shown to be more favorable for CO2/N2 separation than CO2/CH4. Poly(RTIL)−RTIL composites are highly tunable materials with excellent promise as gas separation membranes. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801019x
