VANADIUM-PHOSPHORUS-OXYGEN INDUSTRIAL CATALYSTS FOR N-BUTANE OXIDATION: CHARACTERIZATION AND KINETIC MEASUREMENTS.

Robert W. Wenig, Glenn L Schrader

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

Vanadium-phosphorus-oxygen (V-P-O) catalysts, prepared in alcohol solution with P-to-V ratios from 0. 9 to 1. 12, were characterized by X-ray diffraction, infrared spectroscopy, laser Raman spectroscopy, scanning electron microscopy, and X-ray photoelectron spectroscopy. A strong effect of P-to-V synthesis ratio on catalyst structure, catalyst morphology, vanadium oxidation state, and reactivity in n-butane selective oxidation to maleic anhydride was observed. A slight 'excess' of catalyst phosphorus (P/V equals 1. 1 catalyst) was found to stabilize a (VO)//2P//2O//7 phase which was active and selective in n-butane oxidation; a larger excess of phosphorus was found to enhance selectivity of the (VO)//2P//2O//7 phase at the expense of catalyst activity. Used V-P-O catalysts without 'excess' phosphorus contained the active but nonselective alpha -VOPO//4 phase.

Original languageEnglish (US)
Pages (from-to)612-620
Number of pages9
JournalIndustrial & Engineering Chemistry, Fundamentals
Volume25
Issue number4
Publication statusPublished - Nov 1986
Externally publishedYes

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ASJC Scopus subject areas

  • Engineering(all)
  • Polymers and Plastics
  • Environmental Science(all)
  • Chemical Engineering (miscellaneous)

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