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 Citations (Scopus)

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
StatePublished - Nov 1986
Externally publishedYes

Fingerprint

Vanadium
Butane
vanadium
Phosphorus
catalyst
Oxygen
phosphorus
oxidation
kinetics
Oxidation
oxygen
Catalysts
Kinetics
Maleic Anhydrides
Laser spectroscopy
Maleic anhydride
Raman spectroscopy
butane
Infrared spectroscopy
infrared spectroscopy

ASJC Scopus subject areas

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

Cite this

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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.",
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N2 - 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.

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