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

N. K. Mal, M. Sasidharan, M. 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 Jan 1

Keywords

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

ASJC Scopus subject areas

  • Catalysis
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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    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.