Stable and selective perovskite catalyst for dehydrogenation of propane working with redox mechanism

Ryo Watanabe, Yoshiaki Hondo, Kei Mukawa, Choji Fukuhara, Eiichi Kikuchi, Yasushi Sekine

    Research output: Contribution to journalArticle

    17 Citations (Scopus)

    Abstract

    Dehydrogenation of propane with steam was investigated using novel LaCoxMn1-xO3 (0≤x≤1) perovskite-type oxide (ABO3) catalysts. Optimization of the Co substitution ratio (x = 0.2) enabled high propylene yield and selectivity. The perovskite structure of LaCO0.2Mn0.8O3 remained stable during dehydrogenation, as confirmed by XRD measurements. Dehydrogenation of propane over LaCo0.2Mn0.8O3 perovskite catalyst proceeded via reduction-oxidation (redox) of the perovskite oxide; oxidative dehydrogenation of propane consumed lattice oxygen in the perovskite and the consumed lattice oxygen was regenerated by H2O. Surface analyses conducted using XPS and XANES showed that a part of Mn4+ and Co 3+ in LaCo0.2Mn0.8O3 was reduced to Mn3+ and Co2+ during the reaction. The LaCo 0.2Mn0.8O3 catalyst showed higher selectivity at the same propane conversion compared with the selectivity to propylene over an industrial CrOx/γ-Al2O3 catalyst.

    Original languageEnglish
    Pages (from-to)74-84
    Number of pages11
    JournalJournal of Molecular Catalysis A: Chemical
    Volume377
    DOIs
    Publication statusPublished - 2013

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    Keywords

    • Dehydrogenation
    • Lattice oxygen
    • Perovskite
    • Propylene
    • Redox

    ASJC Scopus subject areas

    • Catalysis
    • Physical and Theoretical Chemistry
    • Process Chemistry and Technology

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