助剂对甲烷部分氧化制合成气镍基催化剂性能的影响

The promotional effect of Ce, La and Ca on the catalytic performance of Ni catalyst was investigated. The results indicated that the effect of promoters on Ni/α-Al2O3 is better than that on Ni/γ-Al2O3. Ce was proved to be the best promoter among the three promoters tested and the effect of different loadings of promoter Ce on the catalytic performance was investigated.The results showed that the optimum content of Ce was 1%. The effect of Ce loading on 10%Ni/γ-Al2O3 catalyst was investigated by XRD, XPS and TG techniques. XRD result indicated that Ce was highly dispersed at low loadings, but crystallized into bulk CeO2 at higher loading, thus, decreased the catalytic activity.