Improving CO2 selectivity in polymerized room-temperature ionic liquid gas separation membranes through incorporation of polar substituents

Bara, Jason E.; Gabriel, Christopher; Hatakeyama, Evan S.; Carlisle, Trevor K.; Lessmann, Sonja; Noble, Richard D.; Gin, Douglas L.

doi:10.1016/j.memsci.2007.12.033

Cited by 237 publications

(153 citation statements)

References 20 publications

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“…Ionic liquids and polymers with quaternary ammonium groups have also been reported with high CO 2 solubility [24] and high selectivity for CO 2 /N 2 or CO 2 /H 2 [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Quaternary ammonium membrane materials for CO2 separation

Shishatskiy

Pauls

Nunes

et al. 2010

Journal of Membrane Science

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a b s t r a c tQuaternary ammonium compounds are known to have extremely high affinity to carbon dioxide. Two new highly hydrophilic compounds containing one or two quaternary ammonium moieties attached to the reactive trimethoxy silane were synthesized and studied for physico-chemical and gas transport properties in the dry and wet environments. Both compounds in the form of blends with PEBAX ® MH 1657 showed high CO 2 solubility coefficients and high CO 2 /N 2 (up to 1500) and CO 2 /H 2 (up to 1350) solubility selectivity. The dry gas measurements revealed the presence of specific interaction with CO 2 resulting in strong binding of the gas molecule to the polymer active center resulting in increased solubility and decreased diffusion coefficients. At low temperatures CO 2 was irreversibly sorbed in the quaternary ammonium compound and was released only at temperatures higher than 60 • C. For the sample modified by co-hydrolysis with TEOS the temperature of 60 • C was found to be an additional transition point giving for H 2 , N 2 , O 2 and CO 2 break on the solubility coefficient Arrhenius plots. Measurements carried out with humid feed revealed up to 35-fold increase of gas permeability without CO 2 /N 2 and CO 2 /H 2 ideal selectivity loss compared to the dry gas measurements.

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“…Ionic liquids and polymers with quaternary ammonium groups have also been reported with high CO 2 solubility [24] and high selectivity for CO 2 /N 2 or CO 2 /H 2 [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Quaternary ammonium membrane materials for CO2 separation

Shishatskiy

Pauls

Nunes

et al. 2010

Journal of Membrane Science

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show abstract

“…The RTIL membranes synthesized in our laboratory were compared with other SILMs reported in the literature (Table 3 and Fig. 5) [18,19]. The supported ionic liquid membranes (SILMs) surveyed in this article ( rable to those of the polymeric membranes, generally below 2 × 10 −9 mol m −2 s −1 Pa −1 (1000 Barrer).…”

Section: Resultsmentioning

confidence: 98%

Supported room temperature ionic liquid membranes for CO2/CH4 separation

Iarikov

Hacarlioglu

Oyama

2011

Chemical Engineering Journal

124

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“…This sence, several polyILs have also show a good performace for CO 2 capture (ad.Tang et al, 2005, Hu et al, 2006, Bara et al, 2007, a, b. Bara et al, 2008. As example Bara et al in 2008, after several works in developing polyILs for gas separation membranes, in 2008 published a paper about a second-generation of functionalized polyILs using imidazolium-based monomers containing either a polar, oligo(ethylene glycol) substituent and alkyl-terminated nitrile groups (C n CN) on the cation of imidazolium-based ILs, which contribute can have pronounced effects on gas separations in polymer membranes for improving CO 2 selectivity. Membranes were prepared via the photopolymerization of IL monomers with additional cross-linker (divinylbenzene) on porous supports.…”

Section: Ionic Liquids In Membranes For Selective Gases Separationmentioning

confidence: 99%