Highly active Ni/Al2O3 catalyst for CO2 methanation by the decomposition of Ni-MOF@Al2O3 precursor via cold plasma

Jiahui Yu, Bingge Feng, Shuai Liu, Xueliang Mu, Edward Lester, Tao Wu

    Research output: Journal PublicationArticlepeer-review

    Abstract

    In this work, a novel Ni/Al2O3-P catalyst for CO2 methanation was prepared via an oxygen plasma decomposition of the Ni-MOF@Al2O3 core–shell precursor. The obtained catalyst showed a higher Ni dispersion (26.5%) and contained less NiAl2O4 spinel when compared with the Ni/Al2O3 prepared by the traditional method. The Ni/Al2O3-P catalyst showed significantly enhanced efficiency toward CO2 methanation as compared with those catalysts with a similar nickel loading but are prepared using the traditional method. For example, the space time yield of methane (STYCH4) of the Ni/Al2O3-P catalyst was as high as 21103.6 mg∙gNi-1∙h−1 at 400 °C and GHSV as 12000 ml∙g−1∙h−1, which is 3.4 times higher than that of the reported catalyst (6190.5 mg∙gNi-1∙h−1) with a similar nickel loading under similar reaction conditions. Moreover, Density Functional Theory (DFT) studies together with the CO2-TPD results revealed that both nickel surface and Ni-Al2O3 interface could activate CO2, while the NiAl2O4 surface could not.

    Original languageEnglish
    Article number119036
    JournalApplied Energy
    Volume315
    DOIs
    Publication statusPublished - 1 Jun 2022

    Keywords

    • CO methanation
    • DFT calculation
    • MOF
    • Nickel dispersion
    • Nickel nano-catalysts

    ASJC Scopus subject areas

    • Building and Construction
    • Mechanical Engineering
    • Energy (all)
    • Management, Monitoring, Policy and Law

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