Selective oxidation of isobutene over multicomponent molybdate catalyst

F. Benyahia, A. M. Mearns

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The kinetics of the selective oxidation of isobutene to methacrolein over multicomponent molybdate catalyst were investigated in a differential tubular flow reactor at low conversion levels. The study was carried out over the temperature range 609 to 694 K. The data were fitted to a number of standard kinetic models based on Mars-van Krevelen and Langmuir-Hinshelwood mechanisms, and also to the empirical power rate law model. The kinetics of the formation of methacrolein were best represented by the redox model in which non-dissociated oxygen is involved in the reoxidation step. The rate determining step was found to be the catalyst reduction with an energy of activation of 177 kJ/mol. The activation energy for catalyst reoxidation is found to be 71 kJ/mol.

Original languageEnglish
Pages (from-to)149-159
Number of pages11
JournalApplied Catalysis
Volume70
Issue number1
DOIs
Publication statusPublished - 1 Jan 1991

Keywords

  • catalyst preparation (co-precipitation).
  • isobutene
  • kinetics
  • methacrolein
  • multicomponent molybdate catalyst
  • redox model
  • selective oxidation

ASJC Scopus subject areas

  • Engineering(all)

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