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

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

研究成果: Article査読

25 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)128-136
ページ数9
ジャーナルJournal of Catalysis
192
1
DOI
出版ステータスPublished - 2000 5月 15
外部発表はい

ASJC Scopus subject areas

  • 触媒
  • 物理化学および理論化学

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