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用浸渍法制备了添加不同第二金属组分M的NiM/La2O3/γ-Al2O3催化剂,考查第二活性金属组分对沼气重整制氢催化剂Ni/La2O3/γ-Al2O3的结构及催化性能的影响,并运用XRD、H2-TPR、BET及TG-DSC等对催化剂进行表征。结果表明:第二活性金属的添加增强了催化剂中金属与载体的相互作用,使催化剂的还原温度升高;第二活性金属的引入还可使催化剂还原后的金属颗粒变小,小晶粒能提供更多的活性面,从而使催化剂的抗积碳性和活性得到较大改善,但Cu的加入却使Ni晶粒有所长大。大部分添加了第二活性金属组分催化剂的活性和稳定性均比单金属催化剂要好,其中NiCo/LaAl表现出最好性能。
NiM / La2O3 / γ-Al2O3 catalysts with different second metal components M were prepared by impregnation method. The effects of the second active metal component on the structure and catalytic performance of Ni / La2O3 / γ-Al2O3 catalyst for biogas reforming The catalysts were characterized by XRD, H2-TPR, BET and TG-DSC. The results show that the addition of the second active metal enhances the interaction between the metal and the support in the catalyst and increases the reduction temperature of the catalyst. The introduction of the second active metal also reduces the size of the metal particles reduced by the catalyst, Provide more active surface, so as to greatly improve the anti-carbon retention and the activity of the catalyst, but the addition of Cu causes the growth of Ni grains. Most of the catalysts with the second active metal added showed better activity and stability than the single metal catalysts, with NiCo / LaAl showing the best performance.