CHx addition-abstraction mechanism of aromatization of methylpentanes on nickel and cobalt catalysts

Research output: Contribution to journalArticle

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Abstract

The mechanism of dehydrocyclization has been investigated with a group of branched C6 and C7 isomeric hydrocarbons containing only four or five carbon atoms in the main chain on Ni and Co catalysts of small and medium dispersion in the temperature range 573-650 K. At low H2 HC ratios transformation of 2-methylpentane, 3-methylpentane, and 3-ethylpentane yields toluene and ethylbenzene, respectively, besides benzene. Evidence is presented that the formation of benzene takes place via CHx-addition to a vinylic group, 1,6-ring closure, and CHx-abstraction in the adsorbed phase. In the proposed reaction sequence the rate of CHx insertion is regarded as the rate-limiting step of aromatization. Participation of the bond-shift or the C5-cyclization route of aromatization is not significant over Ni and Co.

Original languageEnglish
Pages (from-to)14-19
Number of pages6
JournalJournal of Catalysis
Volume89
Issue number1
DOIs
Publication statusPublished - 1984

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Aromatization
Cobalt
Benzene
Nickel
cobalt
benzene
nickel
catalysts
Catalysts
Ethylbenzene
Cyclization
Toluene
Hydrocarbons
closures
toluene
insertion
Carbon
hydrocarbons
routes
Atoms

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Cite this

CHx addition-abstraction mechanism of aromatization of methylpentanes on nickel and cobalt catalysts. / Sárkány, A.

In: Journal of Catalysis, Vol. 89, No. 1, 1984, p. 14-19.

Research output: Contribution to journalArticle

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