PREPARATION AND ACTIVITY OF NI-Y-ZR-O CATALYSTS FOR THE STEAM REFORMING CONVERSION OF METHANE

Physicochemical and catalytic properties of Ni-Y-Zr-O compositions dep endent on the conditions and the method of catalysts were studied. The optimum composition of a yttrium-zirconium support at which the solid solution (Zr1-xYx)O2-x/2 with a cubic structure is formed, was found. After thermal treatment at 700 degrees C, this support is highly disp ersed. It was shown that, regardless of the method of supporting a nic kel-containing component, the catalysts obtained are highly active in the reaction of methane steam reforming. The catalysts prepared by imp regnation and coprecipitation exhibit the highest mechanical strength.