Mechanism of the skeletal isomerisation of linear butenes over ferrierite: Analysis of side reactions

M. Kangas, J. Villegas, N. Kumar, T. Salmi, D. Yu Murzin*, F. Sandelin, E. Harlin

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

9 Citations (Scopus)


An investigation of the effect of reaction conditions on product distribution in the skeletal isomerisation reaction of linear butenes has been carried out. The main reaction routes over ferrierite have been identified. Beside the main product isobutene, major by-product formation occurs. The unwanted reactions include dimerisation of butene to form octenes, hydrogen transfer yielding small amounts of saturated C3 and C4 hydrocarbons and disproportionation producing propene and pentenes. The most abundant by-products were pentene and propene, though these were not formed in equimolar amounts as could be expected. Oligomerisation experiments of propene over ferrierite produced large amounts of butene and pentene, revealing the presence of adsorbed nonene. The cracking of this surface species to hexene and propene is the most likely reaction route for the excess propene formation. This additional path to propene formation operates mainly at temperatures above 623 K.

Original languageEnglish
Pages (from-to)363-366
Number of pages4
JournalCatalysis Today
Issue number3-4
Publication statusPublished - 28 Feb 2005
MoE publication typeA1 Journal article-refereed


  • Ferrierite
  • Isomerisation
  • n-Butene


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