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

    16 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

    Fingerprint

    Propane
    Dehydrogenation
    dehydrogenation
    propane
    Perovskite
    catalysts
    Oxidation
    oxidation
    Catalysts
    selectivity
    propylene
    Oxides
    Propylene
    oxides
    Oxygen
    oxygen
    steam
    Catalyst selectivity
    Steam
    substitutes

    Keywords

    • Dehydrogenation
    • Lattice oxygen
    • Perovskite
    • Propylene
    • Redox

    ASJC Scopus subject areas

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

    Cite this

    Stable and selective perovskite catalyst for dehydrogenation of propane working with redox mechanism. / Watanabe, Ryo; Hondo, Yoshiaki; Mukawa, Kei; Fukuhara, Choji; Kikuchi, Eiichi; Sekine, Yasushi.

    In: Journal of Molecular Catalysis A: Chemical, Vol. 377, 2013, p. 74-84.

    Research output: Contribution to journalArticle

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    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.",
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    T1 - Stable and selective perovskite catalyst for dehydrogenation of propane working with redox mechanism

    AU - Watanabe, Ryo

    AU - Hondo, Yoshiaki

    AU - Mukawa, Kei

    AU - Fukuhara, Choji

    AU - Kikuchi, Eiichi

    AU - Sekine, Yasushi

    PY - 2013

    Y1 - 2013

    N2 - 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.

    AB - 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.

    KW - Dehydrogenation

    KW - Lattice oxygen

    KW - Perovskite

    KW - Propylene

    KW - Redox

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