VANADIUM-TITANIUM OXIDE CATALYSTS. INFLUENCE OF THE PREPARATION METHOD ON THE o-XYLENE SELECTIVE OXIDATION

✍ Scribed by I. Georgiadou; S. Slavov; CH. Papadopoulou; H. K. Matralis; CH. Kordulis

• Publisher: Wiley (John Wiley & Sons)
• Year: 2010
• Weight: 425 KB
• Volume: 104
• Category: Article
• ISSN: 0037-9646
• DOI: 10.1002/bscb.19951040306

✦ Synopsis

Vanadium oxide supported on titania catalysts prepared by the "Equilibrium Deposition followed by Filtration" method (EDF) and the conventional Wet-impregnation method (WI) were extensively characterized by the joint use of various physicochemical techniques (BET, XRD, FT-IR, DRS, XPS, AEM, TPR, and TPD of NH3 ) and were tested for the partial gas-phase oxidation of o-xylene. It was found that the EDF method leads to more selective monolayer catalysts. The increased selectivity has been attributed to the reduction of the surface acidity, to the enhancement of the Vv/ VIV ratio and to the redox properties induced in this catalyst by the above preparation method