Imidazolium-based poly(ionic liquid)s as new alternatives for CO₂ capture

Elena I. Privalova, Erno Karjalainen, Maristiina Nurmi, Päivi Mäki-Arvela, Kari Eränen, Heikki Tenhu, Dmitry Murzin, Jyri-Pekka Mikkola

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    Abstract

    Solid imidazolium-based poly(ionic liquid)s with variable molecular weights that contain the poly[2-(1-butylimidazolium-3-yl)ethyl methacrylate] (BIEMA) cation and different counter anions were evaluated in terms of CO2 capture and compared with classical ionic liquids with similar counter anions. In addition to poly(ionic liquid)s with often-applied ions such as BF4 (-) , PF6 (-) , NTf2 (-) , trifluoromethanesulfonate (OTf(-) ) and Br(-) , for the first time [BIEMA][acetate] was synthesised, which revealed a remarkably high CO2 sorption performance that exceeded the poly(ionic liquid)s studied previously on average by a factor of four (12.46 mg gPIL (-1) ). This study provides an understanding of the factors that affect CO2 sorption and a comparison of the CO2 capture efficiency with the frequently used sorbents. Moreover, all the studied sorbents were reusable if regenerated under carefully selected conditions and can be considered as suitable candidates for CO2 sorption.
    Original languageUndefined/Unknown
    Pages (from-to)1500–1509
    JournalChemSusChem
    Volume6
    Issue number8
    DOIs
    Publication statusPublished - 2013
    MoE publication typeA1 Journal article-refereed

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