Comparative study of the catalytic properties of ZSM-22 and ZSM-35/ferrierite zeolites in the skeletal isomerization of 1-butene

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

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

61 Citations (Scopus)

Abstract

The catalytic activities of the two catalysts ZSM-22 and ZSM-35 were compared in the skeletal isomerization of 1-butene. ZSM-22 demonstrated higher activity in 1-butene transformation, compared to that of ZSM-35. ZSM-35 was not selective to isobutene until non-selective acid sites had been poisoned by coke deposits, while ZSM-22 was selective already from the beginning. Information about the extent of coke formation was obtained by FTIR experiments and surface area measurements. ZSM-22 was more resistant towards coke formation, compared to that of ZSM-35. In order to obtain information about the reaction mechanism, 2,4,4-trimethyl-2-pentene and 1-octene were cracked over the catalysts. The selective mechanism for isobutene formation in the skeletal isomerization of 1-butene was most likely monomolecular. The bimolecular mechanism is not selective to isobutene, although it can contribute to the overall isobutene production.

Original languageEnglish
Article numberCA982174
Pages (from-to)611-620
Number of pages10
JournalJournal of Catalysis
Volume178
Issue number2
DOIs
Publication statusPublished - 1998
MoE publication typeA1 Journal article-refereed

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