CO2 separation applying ionic liquid mixtures: the effect of mixing different anions on gas permeation through supported ionic liquid membranes

Abstract

In order to increase flexibility in tailoring the permeability and selectivity of supported ionic liquid membranes (SILMs) for flue gas separation and natural gas purification, this work explores the use of ionic liquid mixtures. For that purpose, gas permeation properties of CO 2 , CH 4 were measured at 293 K using a time lag apparatus. In addition to gas permeation results, the thermophysical properties of those mixtures, namely viscosity and density, were also determined so that trends between the two types of properties could be evaluated. The results show that mixing [Ac] or

Investigation of gas permeation properties of film forming polymeric ionic liquids (PILs) based on polybenzimidazoles

“…PILs and ILs based on Ac -as anion are known to possess exceptionally high CO 2 sorption and selectivity (esp. S CO 2 =S N 2 ) over other gases [20,42,43]. In present series as well, [TMPBI-BuI][Ac] exhibited highest CO 2 sorption (Fig.…”

Ionic liquids with anions based on fluorosulfonyl derivatives: from asymmetrical substitutions to a consistent force field model

“…3. The density and viscosity data of [C 2 mim][TFSI] (previously reported by our group) 17 at 303.15 K and atmospheric pressure are also included in Table 1 for comparison purposes. Fig.…”

Novel pyrrolidinium-based polymeric ionic liquids with cyano counter-anions: High performance membrane materials for post-combustion CO2 separation

“…Given that membrane technology has competitive advantages compared to bulky-fluid absorption, including lower capital costs and energy consumption, small scale equipment and environmentally benign operation [36], a wide range of different IL phases has been used to develop SILM configurations for CO 2 separation from gas streams [37][38][39][40][41][42][43][44][45][46]. Even though some SILMs have shown very impressive CO 2 /N 2 separation performances, consistently close or above the 2008 Robeson plot upper bound [47], their industrial application is limited due to their inadequate long-term stability since they are susceptible to failure if the pressure differential across the membrane is high enough to push out the IL phase from the pores of the membrane support [14].…”