Isomerization of 2-methylpentane and ring opening of methylcyclopentane over Pt-Co/NaY catalysts

F. Garin, P. Girard, G. Maire, G. Lu, L. Guczi

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13 Citations (Scopus)


The catalytic transformations of 2-methylpentane (2MP), and methylcyclopentane (MCP), over Co/NaY, Pt-Co/NaY, Pt-Co/Al2O3 and NaY samples have been investigated. Co/NaY was found to be an excellent isomerization catalyst, in contrast to Co/Al2O3 on which the main route was observed to be cracking. This is attributed to the difference in cobalt reducibility over the two supports. The use of 13C-labelled 2-methyl pentanes made the elucidation of the mechanism of isomerization on these samples possible. A cyclic mechanism (CM) operates only on metal particles, while for both metal particles and support, a bond shift mechanism (BS) is the main route for isomerisation. On Pt-Co/NaY samples, the contribution of the cyclic mechanism to isomerisation relative to isomerisation by bond shift route is significantly enhanced on the catalysts with cobalt loading higher than 22 at.%. The results are discussed in terms of small metal particles inserted into NaY supercage and the enhanced reduction of cobalt ions.

Original languageEnglish
Pages (from-to)237-247
Number of pages11
JournalApplied Catalysis A: General
Issue number2
Publication statusPublished - May 7 1997


  • C-labelled compounds
  • Cobalt
  • Cyclic and bond shift mechanism for isomerization
  • Hydrocarbon transformation
  • Platinum-cobalt catalysts
  • Support effect on alumina and NaY zeolite

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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