Plasma-assisted methane reduction of a NiO catalyst-Low temperature activation of methane and formation of carbon nanofibres

Helen J. Gallon, Xin Tu, Martyn V. Twigg, J. Christopher Whitehead

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    Abstract

    The low temperature reduction of a NiO catalyst by CH4 was performed in a coaxial double dielectric barrier discharge (DBD) reactor for the first time. The reduction involves active surface carbon which is produced via plasma decomposition of CH4. On the reduced Ni catalyst, activation of CH4 and its fragments to form H2 and carbon nanofibres occurred at 330°C. CH4 conversions of 37% were achieved in the plasma-catalytic reaction at atmospheric pressure, with 99% selectivity towards H2 and solid carbon. These results demonstrate a synergistic effect where both the plasma and catalyst are vital for the production of H2 and carbon nanofibres. In the absence of the catalyst stable plasma could not be ignited with a pure CH4 flow and thermal studies showed that in the absence of the plasma CH4 conversion was minimal. © 2011 Elsevier B.V.
    Original languageEnglish
    Pages (from-to)616-620
    Number of pages4
    JournalApplied Catalysis B: Environmental
    Volume106
    Issue number3-4
    DOIs
    Publication statusPublished - 11 Aug 2011

    Keywords

    • Carbon nanomaterials
    • Dielectric barrier discharge
    • Methane activation
    • NiO reduction
    • Plasma-catalysis

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