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

Ryo Watanabe, Taito Hayashi, Yasushi Sekine, Masahiko Matsukata, Eiichi Kikuchi

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    The role of palladium on the Fe-K catalyst empirically was studied by use of a periodical pulse technique from a mechanistic point of view. Styrene was formed via either dehydrogenation or oxidative dehydrogenation. The latter reaction was faster than the former, and it proceeded by consuming the surface lattice oxygen in the catalyst. The lattice oxygen was subsequently supplied from steam that is commonly believed to act as the diluent to reduce the partial pressure of styrene, known as a favorable effect to shift the equilibrium of volume-expanding reactions in a thermodynamic sense. Palladium added to the Fe-K oxide catalysts enhanced 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. Water molecule (steam) worked as a diluent and as a reactant to form hydrogen and lattice oxygen. This is an abstract of a paper presented at the 17th Annual Saudi-Japanese Symposium on Catalysts in Petroleum Refining and Petrochemicals 2007 (Dhahran, Saudi Arabia 11/11-12/2007).

    Original languageEnglish
    Title of host publicationKing Fahd University of Petroleum and Minerals, Research Institute - Annual Catalysts in Petroleum Refining and Petrochemicals Symposium Papers
    Pages112-120
    Number of pages9
    Publication statusPublished - 2007
    EventKing Fahd University of Petroleum and Minerals - 17th Annual Saudi-Japanese Symposium on Catalysts in Petroleum Refining and Petrochemicals 2007 - Dhahran
    Duration: 2007 Nov 112007 Nov 12

    Other

    OtherKing Fahd University of Petroleum and Minerals - 17th Annual Saudi-Japanese Symposium on Catalysts in Petroleum Refining and Petrochemicals 2007
    CityDhahran
    Period07/11/1107/11/12

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    ASJC Scopus subject areas

    • Catalysis

    Cite this

    Watanabe, R., Hayashi, T., Sekine, Y., Matsukata, M., & Kikuchi, E. (2007). High performance of Fe-K oxide catalysts for dehydrogenation of ethylbenzene to styrene with an aid of ppm-order Pd. In King Fahd University of Petroleum and Minerals, Research Institute - Annual Catalysts in Petroleum Refining and Petrochemicals Symposium Papers (pp. 112-120)