High performance of Fe-K oxide catalysts for dehydrogenation of ethylbenzene to styrene with an aid of ppm-order Pd

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    Abstract

    Styrene is manufactured industrially through catalytic dehydrogenation of ethylbenzene on Fe-K oxide-based catalysts. It was invented by Süd-Chemie Group that the activity of the industrial ethylbenzene dehydrogenation catalysts (Styromax) based on the oxides of Fe and K is highly promoted by the addition of small amount (hundreds ppm-order) of precious metals such as Pd. The present work is intended to elucidate the role of Pd on the Fe-K catalyst empirically by use of a periodical pulse technique from a mechanistic point of view. The oxidative dehydrogenation was faster than the simple dehydrogenation, and it proceeded by consuming the surface lattice oxygen in the catalyst. The lattice oxygen was subsequently supplied from steam. Palladium added to the Fe-K oxide catalysts was found to enhance the rate of regeneration (supplying) of the lattice oxygen, although it hardly changed the rate of dehydrogenation of ethylbenzene or consumption of surface lattice O2- anions. This study demonstrated that steam works not only as a diluent but also as a reactant to form hydrogen and lattice oxygen.

    Original languageEnglish
    Pages (from-to)215-219
    Number of pages5
    JournalCatalysis Letters
    Volume125
    Issue number3-4
    DOIs
    Publication statusPublished - 2008 Oct

    Fingerprint

    Styrene
    Ethylbenzene
    Dehydrogenation
    Oxides
    Catalysts
    Oxygen
    Steam
    Palladium
    Precious metals
    Anions
    Hydrogen
    Negative ions
    ethylbenzene

    Keywords

    • Effect of Pd
    • Fe-K catalyst
    • Lattice oxygen
    • Oxidative dehydrogenation of ethylbenzene

    ASJC Scopus subject areas

    • Catalysis
    • Chemistry(all)

    Cite this

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    title = "High performance of Fe-K oxide catalysts for dehydrogenation of ethylbenzene to styrene with an aid of ppm-order Pd",
    abstract = "Styrene is manufactured industrially through catalytic dehydrogenation of ethylbenzene on Fe-K oxide-based catalysts. It was invented by S{\"u}d-Chemie Group that the activity of the industrial ethylbenzene dehydrogenation catalysts (Styromax) based on the oxides of Fe and K is highly promoted by the addition of small amount (hundreds ppm-order) of precious metals such as Pd. The present work is intended to elucidate the role of Pd on the Fe-K catalyst empirically by use of a periodical pulse technique from a mechanistic point of view. The oxidative dehydrogenation was faster than the simple dehydrogenation, and it proceeded by consuming the surface lattice oxygen in the catalyst. The lattice oxygen was subsequently supplied from steam. Palladium added to the Fe-K oxide catalysts was found to enhance the rate of regeneration (supplying) of the lattice oxygen, although it hardly changed the rate of dehydrogenation of ethylbenzene or consumption of surface lattice O2- anions. This study demonstrated that steam works not only as a diluent but also as a reactant to form hydrogen and lattice oxygen.",
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    author = "Yasushi Sekine and Ryo Watanabe and Masahiko Matsukata and Eiichi Kikuchi",
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    AU - Sekine, Yasushi

    AU - Watanabe, Ryo

    AU - Matsukata, Masahiko

    AU - Kikuchi, Eiichi

    PY - 2008/10

    Y1 - 2008/10

    N2 - Styrene is manufactured industrially through catalytic dehydrogenation of ethylbenzene on Fe-K oxide-based catalysts. It was invented by Süd-Chemie Group that the activity of the industrial ethylbenzene dehydrogenation catalysts (Styromax) based on the oxides of Fe and K is highly promoted by the addition of small amount (hundreds ppm-order) of precious metals such as Pd. The present work is intended to elucidate the role of Pd on the Fe-K catalyst empirically by use of a periodical pulse technique from a mechanistic point of view. The oxidative dehydrogenation was faster than the simple dehydrogenation, and it proceeded by consuming the surface lattice oxygen in the catalyst. The lattice oxygen was subsequently supplied from steam. Palladium added to the Fe-K oxide catalysts was found to enhance the rate of regeneration (supplying) of the lattice oxygen, although it hardly changed the rate of dehydrogenation of ethylbenzene or consumption of surface lattice O2- anions. This study demonstrated that steam works not only as a diluent but also as a reactant to form hydrogen and lattice oxygen.

    AB - Styrene is manufactured industrially through catalytic dehydrogenation of ethylbenzene on Fe-K oxide-based catalysts. It was invented by Süd-Chemie Group that the activity of the industrial ethylbenzene dehydrogenation catalysts (Styromax) based on the oxides of Fe and K is highly promoted by the addition of small amount (hundreds ppm-order) of precious metals such as Pd. The present work is intended to elucidate the role of Pd on the Fe-K catalyst empirically by use of a periodical pulse technique from a mechanistic point of view. The oxidative dehydrogenation was faster than the simple dehydrogenation, and it proceeded by consuming the surface lattice oxygen in the catalyst. The lattice oxygen was subsequently supplied from steam. Palladium added to the Fe-K oxide catalysts was found to enhance the rate of regeneration (supplying) of the lattice oxygen, although it hardly changed the rate of dehydrogenation of ethylbenzene or consumption of surface lattice O2- anions. This study demonstrated that steam works not only as a diluent but also as a reactant to form hydrogen and lattice oxygen.

    KW - Effect of Pd

    KW - Fe-K catalyst

    KW - Lattice oxygen

    KW - Oxidative dehydrogenation of ethylbenzene

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