Characterization and phenomena happened during the synthesis of AuY catalyst and its activity in the complete oxidation of toluene

Abstract

Gold catalysts supported on zeolite Y were prepared by ion-exchange. The catalysts were characterized by XRD, TGA/DTA, IR, SEM and TEM. It is shown that gold crystallites are deposited on framework of zeolit and zeolit structure is not deformed afier being dried at 110^oC and calcined at 400^oC. The average size of the gold particles depends on the gold content of the support. The complete oxidation of toluen in air was carried out over AiiY. Catalytic activity was tested at temperature of 250 to 400^oC. Toluene was converted completely to COx. No organic byproducts were detected. Catalytic activity depends on temperature, gold content and time on stream.