Kinetics and mechanism of oxidation of n-butenes over SnO2Sb2O4 catalysts

K. Hernádi, J. Halász, K. Varga, I. Marsi, P. Fejes

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3 Citations (Scopus)

Abstract

Over Sn:Sb=3:l catalyst at 423-673 K the kinetics of oxidation and isomerization of 1-butene and cis- and trans-2-butene have been studied in a recirculatory batch reactor. The oxygen uptake of the catalysts was determined with a microbalance and kinetic parameters of oxidation were calculated. Comparison of the oxidation of the n-butenes demonstrates that both the conversion and the selectivity for butadiene are much lower in the reaction of both 2-butenes than in the oxidation of 1-butene. Since the double-bond isomerization (taking place over the Brönsted-type acidic sites of the catalyst) is a much slower reaction even at higher reaction temperatures, it was supposed that the only reaction step yielding butadiene is 1-butene→butadiene on an oxidation site.

Original languageEnglish
Pages (from-to)361-370
Number of pages10
JournalJournal of molecular catalysis
Volume63
Issue number3
DOIs
Publication statusPublished - Dec 15 1990

ASJC Scopus subject areas

  • Engineering(all)

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