KNbO3 Supported onto BETA Zeolite: Evaluation of the Incorporation Method

Abstract

Mixed oxides present catalytic properties, however, they exhibit low surface area, which limits their use as catalysts. In order to increase their specific surface, materials were prepared incorporation a mixed oxide onto a material with elevated surface area evaluating two methods. The catalytic activity of the materials was evaluated in the oxidation of Methyl Phenyl Sulfide.

The resulting materials were characterized by physicochemical techniques. The surface area decreased with respect to the unmodified matrix as a result of blocking the pores and/or the location of the particles within the pores of the zeolites. By X-ray diffraction it was determined that the sample obtained by the mechanical mixture showed the zeolite signals but with a decrease in intensity; the “in-situ” sample did not present zeolitic structure or crystallinity. The results of catalytic evaluation demonstrated the importance of structure and crystallinity.