In situ Laser Raman Spectroscopy during Sequential Oxidizing and Reducing Conditions for a Vanadium-Phosphorous-Oxide Catalyst

A. D. Soejarto, G. W. Coulston, G. L. Schrader

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

A VPO catalyst prepared in an organic medium has been studied by in situ laser Raman spectroscopy for n-butane oxidation to maleic anhydride. Data could be obtained at low laser power and brief collection times. Raman characterization during continuous flow (steady-state) studies revealed that (VO)2P2O7 was present. Sequential oxidizing (10% O2 in N2) and reducing (2% n-butane in N2) conditions were explored at 350°C and 400°C. These cycling (unsteady-state) operations revealed that formation of V(5+) phases was enhanced during oxidizing conditions. The intensity of Raman bands due to (VO)2P2O7 increased during reducing conditions.

Original languageEnglish (US)
Pages (from-to)594-599
Number of pages6
JournalCanadian Journal of Chemical Engineering
Volume74
Issue number5
DOIs
StatePublished - Jan 1 1996

Keywords

  • In situ Raman spectroscopy
  • Selective oxidation

ASJC Scopus subject areas

  • Chemical Engineering(all)

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