Oxidation resistance of Ni/La0.7Sr0.3AlO 3-δ catalyst for steam reforming of model aromatic hydrocarbon

Yukihiro Sugiura, Daiki Mukai, Yuki Murai, Satoshi Tochiya, Yasushi Sekine

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    11 Citations (Scopus)

    Abstract

    Oxidative resistance of Ni catalysts supported on various oxides La 0.7Sr0.3AlO3-δ, LaAlO3, and α-Al2O3 were investigated for hydrogen production by steam reforming of model aromatic hydrocarbons. Ni/α-Al2O 3 lost its steam reforming activity by oxidation treatment. In contrast, Ni/La0.7Sr0.3AlO3-δ and Ni/LaAlO3 catalysts showed steam reforming activity even after the oxidation treatment. The XANES (X-ray absorption near-edge structure) spectra at Ni K-edge for Ni/La0.7Sr0.3AlO3-δ and Ni/α-Al2O3 after oxidation treatment revealed that the supported Ni on La0.7Sr0.3AlO3-δ and α-Al2O3 were oxidized completely. Although the mean particle size of Ni on Ni/α-Al2O3 increased by oxidation treatment or reduction treatment, Ni particles on Ni/La 0.7Sr0.3AlO3-δ retained the fine structure after oxidation treatment or reduction treatment. Moreover, TPR (temperature programmed reduction) and XPS (X-ray photoelectron spectroscopy) measurements for elucidating the reducibility of Ni/La0.7Sr 0.3AlO3-δ showed that the supported Ni on La 0.7Sr0.3AlO3-δ was easily reduced even after the oxidation treatment.

    Original languageEnglish
    Pages (from-to)7822-7829
    Number of pages8
    JournalInternational Journal of Hydrogen Energy
    Volume38
    Issue number19
    DOIs
    Publication statusPublished - 2013 Jun 27

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    Keywords

    • Ni catalyst
    • Oxidative resistance
    • Perovskite-type oxide support
    • Steam reforming of toluene

    ASJC Scopus subject areas

    • Renewable Energy, Sustainability and the Environment
    • Fuel Technology
    • Condensed Matter Physics
    • Energy Engineering and Power Technology

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