The Effect of ZrO₂ on the Thermal Stabitity of CuO/γ-Al₂O₃ Catalyst

The effect of ZrO 2 additives on the thermal stabitity of CuO/γ-Al₂O₃ catalyst was studied. The XRD,BET surface area and ghe active surface of Cu were measured for the catalysts with variety of Zr/Cu ratio at calcination temperature 750℃ and 950℃ respectivly. The results indicated that the optinum ratio of Zr/Cu is 0.15～0.20.
It was found that the resistant from γ-Al₂O₃ plase to α-Al₂O₃ phase, ghe resistance of sintering for active components and retardation of CuAl₂O₄ formation were resulted during ZrO₂ doped. The reason that ZrO₂ could improve thermal stability and CO conversion were also discussed.