Study on Catalytic Stability of Ni Catalysts for Partial Oxidation of Methane to Syngas

In a fixed-bed reactor,the catalytic activity and stability for partial oxidation of methane to syngas were tested on 10%(mass fraction) Ni/α-Al2O3 and 10% Ni/γ-Al2O3 catalysts at reaction temperature of 800 ℃,space velocity of 10×105 h-1 and n(CH4)/n(O2)/n(N2)of 2/1/1.The catalysts were prepared by impregnation method.Catalytic activity and stability increased in the order of 10% Ni/α-Al2O310%Ni/γ-Al2O3.Specific surface area and XRD measurements for catalysts before and after reaction showed that on 10% Ni/γ-Al2O3 catalysts carbon deposition was one of the factors causing decrease in catalytic activity.