In this study four optimal catalysts on the basis of Pt-CuO supported on y-Al2O3, TiO2, CeO2 and y-A12O3 + CeO2 have been prepared and studied. Characterizations of the catalysts have been carried out by methods of N2 adsorption, x-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM) and temperatureprogrammed-reduction (TPR). The activity of these catalysts for deep oxidation of CO, p-xylene and their mixture was assessed at temperature range 75-300°C. The results showed that the presence of CO in a mixture with p-xylene has a beneficial effect on the rate of p-xylene conversion
meanwhile the presence of p-xylene shows the inhibition on CO oxidation. In the reactions of the mixture, oxidation of CO and p-xylene occurred simultaneously on Pt-CuO catalyst supported on y-Al2O3, TiO2, CeO2 carriers, but on catalyst PtCulCeAl the oxidation of p-xylene can proceed only when CO is consumed entirely. Addition of 1.1 to 3.2 percent mol steam into the gas mixture exhibits no effect on the conversion of CO
meanwhile, it shows the limited effect on oxidation rate of p-xylene on hydrophobic catalysts (PtCu/Ce, PtCu/CeAl and PtCu/ Ti), but strong inhibition on hydrophilic catalyst (PtCu/Al). However, this negative effect of water was reversible.