Oxydehydrogenation of propane over vanadyl ion-containing VAPO-5 and CoAPO-5

M. Okamoto, L. Luo, J. A. Labinger, M. E. Davis

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

Vanadyl ion-containing VAPO-5 and CoAPO-5 were prepared by contact with a vanadyl sulfate solution or by impregnation with aqueous vanadyl oxalate and characterized by powder XRD, ESR spectroscopy, and TPR. The resulting materials were evaluated as catalysts for propane oxidation. Framework vanadium can be reduced by hydrogen at a lower temperature than extraframework vanadium and vanadium in bulk V2O5. Oxyhydrogenation of propane over VAPO-5 samples showed that framework vanadium was the most active and selective species for propylene formation at 400°C, 5% conversion, and 72% selectivity. Extraframework Va species were less active and selective. Treatment of VAPO-5 with vanadyl sulfate solution enhanced the catalytic activity because vanadium is incorporated into the VAPO-5 framework during ion treatment. Va levels > 1 wt %, achieved by impregnation, resulted in the formation of extraframework vanadium.

Original languageEnglish
Pages (from-to)128-136
Number of pages9
JournalJournal of Catalysis
Volume192
Issue number1
DOIs
Publication statusPublished - 2000 May 15
Externally publishedYes

Keywords

  • CoAPO-5
  • Extraframework vanadium
  • Propane oxidation
  • VAPO-5

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

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