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以含量为 2 %的K、Cu、La、Mg、Ca、Ba、Mo、Ce等多种金属作为助剂分别加入Ni/γ Al2 O3 催化剂样品中 ,并对其分别用于CH4 /CO2 重整反应时的活性和积碳量进行了考察。研究结果表明 :加入助剂后的各种催化剂的活性变化不一。其中 ,以含Ca的催化剂效果最好 ,其甲烷的转化率可由原来的 71 91%增加到 72 92 % ,其次为La。但所有加入助剂后的催化剂的抗积碳性能均有所提高 ,特别是碱金属K的添加 ,使催化剂表面积碳量降到了 0 1%。这表明添加碱金属或碱土金属助剂 ,对提高Ni/γ Al2 O3 催化剂在CH4 /CO2 重整反应中的抗积炭性能有很大作用
The Ni / γ Al 2 O 3 catalyst samples were prepared with various metals such as K, Cu, La, Mg, Ca, Ba, Mo and Ce with the content of 2%, and used for CH4 / CO2 reforming Reaction time and the amount of carbon deposition were investigated. The results show that: After adding additives, the activity of various catalysts varies. Among them, the best catalyst containing Ca, the methane conversion rate from the original 71 91% to 72 92%, followed by La. However, the anti-carbon performance of all the catalysts after the addition of additives has been improved. Especially, the addition of alkali metal K reduced the surface carbon content of the catalyst to 0 1%. This indicates that the addition of alkali metal or alkaline earth metal additives has a great effect on improving the anti-carbon deposition performance of Ni / γ Al 2 O 3 catalyst in the CH 4 / CO 2 reforming reaction