Oxidation of o-xylene over vanadium-porous titania glass catalysts

C Y HONG, R P COONEY, Russell Francis Howe

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4 Citations (Scopus)

Abstract

Porous titania glass (PTG) has been loaded with vanadia by several different methods. Nitrogen adsorption-desorption isotherms and X-ray powder diffraction measurements indicate that impregnation methods produce oxovanadium species within the mesopores of the glass. The vanadia-PTG catalysts exhibit similar levels of selectivity and conversion for the oxidation of o-xylene to phthalic anhydride as conventional anatase or rutile supported catalysts, but at significantly lower temperatures. The activity for phthalic anhydride production increases with vanadium loading; the best performance of 50% selectivity to phthalic anhydride at 100% o-xylene conversion was achieved at 280-degrees-C with a catalyst containing 5.6% V (w/w).

Original languageEnglish
Pages (from-to)237-247
Number of pages11
JournalApplied Catalysis A: General
Volume75
Issue number2
DOIs
Publication statusPublished - 15 Aug 1991

Keywords

  • catalyst characterization (adsorption, XRD)
  • catalyst preparation (wet impregnantion)
  • phthalic anhydride
  • titania glass
  • vanadia titania
  • ortho-xylene oxidation
  • phtalic-anhydride
  • V2O5-TIO2 catalysts
  • TIO2 catalysts
  • oxide system
  • active phase
  • monolayer
  • temperature
  • pentoxide
  • evolution
  • kinetics

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