Reforming of n-hexane over Pt-Tin silicalite-1

N. K. Mal, M. Sasidharan, Masahiko Matsukata, S. Sivasanker, A. V. Ramaswamy

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    The catalytic behavior of Pt supported on non-acidic silicalite-1 (MFI structure) and on the stannosilicate, Sn-sil-1 molecular sieves in the aromatization of n-hexane is investigated. The influence of Pt content, temperature, space velocity, H2/n-hexane ratio and time on stream (TOS) on the n-hexane conversion, aromatic selectivity and aromatic yield are presented. Aromatics are the main products and this suggests that the aromatization proceeds via dehydrocyclization and/or hydrogenolysis, dehydrogenation to C2-C4 olefins followed by oligomerization inside the pores of the molecular sieve into cyclic intermediates in presence of hydrogen. The incorporation of Pt during the synthesis of the stannosilicate (Sn-sil-1) yields a more active catalyst (42 wt% aromatic selectivity) without any deactivation than when Pt is loaded by impregnation on Sn-sil-1 because catalyst deactivation associate with platinum outside the zeolite pores. A formation mechanism is proposed.

    Original languageEnglish
    Pages (from-to)2403-2410
    Number of pages8
    JournalStudies in Surface Science and Catalysis
    Volume154 C
    Publication statusPublished - 2004

    Fingerprint

    Tin
    absorbents
    Reforming reactions
    Hexane
    deactivation
    Aromatization
    tin
    selectivity
    Molecular sieves
    space temperature
    porosity
    catalysts
    hydrogenolysis
    dehydrogenation
    alkenes
    Zeolites
    Oligomerization
    Hydrogenolysis
    Catalyst deactivation
    platinum

    Keywords

    • Microporous
    • Pt-containing molecular sieves
    • Reforming of n-hexane
    • Tin-silicate

    ASJC Scopus subject areas

    • Physical and Theoretical Chemistry
    • Catalysis

    Cite this

    Mal, N. K., Sasidharan, M., Matsukata, M., Sivasanker, S., & Ramaswamy, A. V. (2004). Reforming of n-hexane over Pt-Tin silicalite-1. Studies in Surface Science and Catalysis, 154 C, 2403-2410.

    Reforming of n-hexane over Pt-Tin silicalite-1. / Mal, N. K.; Sasidharan, M.; Matsukata, Masahiko; Sivasanker, S.; Ramaswamy, A. V.

    In: Studies in Surface Science and Catalysis, Vol. 154 C, 2004, p. 2403-2410.

    Research output: Contribution to journalArticle

    Mal, NK, Sasidharan, M, Matsukata, M, Sivasanker, S & Ramaswamy, AV 2004, 'Reforming of n-hexane over Pt-Tin silicalite-1', Studies in Surface Science and Catalysis, vol. 154 C, pp. 2403-2410.
    Mal NK, Sasidharan M, Matsukata M, Sivasanker S, Ramaswamy AV. Reforming of n-hexane over Pt-Tin silicalite-1. Studies in Surface Science and Catalysis. 2004;154 C:2403-2410.
    Mal, N. K. ; Sasidharan, M. ; Matsukata, Masahiko ; Sivasanker, S. ; Ramaswamy, A. V. / Reforming of n-hexane over Pt-Tin silicalite-1. In: Studies in Surface Science and Catalysis. 2004 ; Vol. 154 C. pp. 2403-2410.
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