Mercury capture on a supported chlorocuprate(II) ionic liquid adsorbent studied using operando synchrotron X-ray absorption spectroscopy

Roberto Boada, Giannantonio Cibin, Fergal Coleman, Sofia Diaz-Moreno, Diego Gianolio, Christopher Hardacre, Shusaku Hayama, John D. Holbrey, Rafin Ramli, Kenneth R. Seddon, Geetha Srinivasan, Malgorzata Swadzba-Kwasny

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    Abstract

    Mercury scrubbing from gas streams using a supported 1-butyl-3-methylimidazolium chlorocuprate(II) ionic liquid ([C4mim]2[Cu2Cl6]) has been studied using operando EXAFS. Initial oxidative capture as [HgCl3]− anions was confirmed, this was then followed by the unanticipated generation of mercury(I) chloride through comproportionation with additional mercury from the gas stream. Combining these two mechanisms leads to net one electron oxidative extraction of mercury from the gas with increased potential capacity and efficiency for supported ionic liquid mercury scrubbers.
    Original languageEnglish
    Pages (from-to)18946-18953
    Number of pages8
    JournalDalton Transactions
    Volume45
    Issue number47
    Early online date9 Nov 2016
    DOIs
    Publication statusPublished - 2016

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