Simultaneous dehydrogenation and isomerization of n-butane to isobutene over ZSM-22 and zinc-modified ZSM-5 zeolites

R. Byggningsbacka*, N. Kumar, L. E. Lindfors

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

18 Citations (Scopus)

Abstract

Direct formation of isobutene from n-butane was investigated over a zinc-impregnated potassium-ion-exchanged ZSM-5 dehydrogenation catalyst and an acidic shape-selective ZSM-22 skeletal isomerization catalyst. The experiments were performed in a fixed-bed microreactor system operating at near-atmospheric pressure, High selectivity to n-butene was obtained over the zinc-impregnated potassium-ion-exchanged ZSM-5 dehydrogenation catalysts. The yield of isobutene increased after adding the acidic ZSM-22 skeletal isomerization catalyst, although the selectivity to butene isomers slightly decreased because the skeletal isomerization of n-butene was competing with other acid-catalyzed reactions such as cracking and aromatization.

Original languageEnglish
Pages (from-to)173-176
Number of pages4
JournalCatalysis Letters
Volume55
Issue number3-4
DOIs
Publication statusPublished - 1998
MoE publication typeA1 Journal article-refereed

Keywords

  • Dehydrogenation
  • Isobutene
  • N-butane
  • Skeletal isomerization

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