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Journal of Materials Science

, Volume 32, Issue 4, pp 965–969 | Cite as

Effect of preparation method on the dispersion and activity of V2O5–Al2O3 catalysts

  • S. T SRINIVAS
  • L JHANSI LAKSHMI
  • P. S SAI PRASAD
  • S. S MADHAVENDRA
  • P KANTA RAO
Article

Abstract

Al2O3-supported 12 wt% V2O5 catalysts were prepared by physically grinding both the oxides (solid–solid wetting) and by wet impregnation techniques. The physical mixtures (PM) were treated under two different conditions – calcination in the presence of dry oxygen and wet oxygen. The catalysts were characterized by x-ray diffraction, scanning electron microscopy, electron spin resonance and oxygen and carbon dioxide chemisorptions. Vanadia dispersion of the physical mixture calcined in the presence of wet oxygen was found to be very similar to that of the V2O5/Al2O3 catalyst prepared by the standard impregnation method. Methanol partial oxidation activities of these catalysts were also comparable.

Keywords

Physical Mixture HCHO Ammonium Metavanadate Carbon Dioxide Uptake Solid Wetting 

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Copyright information

© Chapman and Hall 1997

Authors and Affiliations

  • S. T SRINIVAS
    • 1
  • L JHANSI LAKSHMI
    • 1
  • P. S SAI PRASAD
    • 1
  • S. S MADHAVENDRA
    • 1
  • P KANTA RAO
    • 1
  1. 1.Catalysis Section, Physical and Inorganic Chemistry DivisionIndian Institute of Chemical TechnologyHyderabadIndia

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