The role of lattice oxygen in the dynamic behavior of oxide catalysts

E. W. Arnold, Sankaran Sundaresan

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

The lattice of an oxide catalyst used for oxidation reactions can act as a reservoir for oxygen, storing and releasing it for reactions at the catalyst surface under appropriate conditions. The implication of this oxygen storage property of an oxide catalyst on its dynamic response characteristics has been investigated through an experimental study of 2-butene oxidation over vanadium oxide as a model reaction. Isothermal reaction rate measurements in a differential reactor and nonisothermal studies in a single pellet reactor have been carried out. Following a step increase in the feed butene concentration, isothermal reaction rate overshoot and pellet temperature overshoot were observed. These observations could be modelled in a qualitatively correct way by a very simple model accounting for the participation of lattice oxygen in the catalytic reactions under dynamic conditions. It is demonstrated through model simulations that the ignition characteristics of a catalyst pellet are significantly affected by the participation of the lattice oxygen, when steady state multiplicity is present.

Original languageEnglish (US)
Pages (from-to)213-230
Number of pages18
JournalChemical Engineering Communications
Volume58
Issue number1-6
DOIs
StatePublished - Aug 1 1987

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Keywords

  • 2-Butene oxidation
  • Catalyst
  • Oxidation
  • Transition-metal

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