预处理及反应条件对负载型钌催化剂甲烷化性能的影响  

Effect of Pretreatment on Catalytic Performance of Ru/Al_2O_3 for Methanation

作　　者：卢红选[1] 秦榜辉[1] 孙鲲鹏[1] 肖利华[1] 徐贤伦[1] 

机构地区：[1]中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室,甘肃兰州730000

出　　处：《天然气化工—C1化学与化工》2004年第4期1-4,共4页Natural Gas Chemical Industry

摘　　要：采用浸渍法制备了w(Ru)=0 5%的Ru/Al2O3催化剂,研究了催化剂在不同的焙烧温度及还原温度下的甲烷化性能。结果表明,还原温度和焙烧温度能明显改变甲烷化的性能。同时,也考察了Cl-对甲烷化性能的影响,并求得在0 5%Ru/Al2O3催化剂作用下CO和CO2甲烷化反应的表观活化能分别为125 4kJ/mol和89 8kJ/mol。Effects of calcination temperature and reduction temperature on catalytic performance of Ru/Al_2O_3 catalysts for methanation were investigated. The results indicated that calcination temperature and reduction temperature affected the activity of Ru/Al_2O_3 catalysts remarkably. The optimum reduction temperature and calcination temperature for CO methanation was 473K and 573K, respectively. In the case of CO_2 methanation, the optimum reduction temperature was between 523～623K, and catalysts calcined at low temperature (393K) showed higher activity. The influence of chloride ion was also investigated and it showed that chloride ion had a negative effect on the catalytic activity of Ru/Al_2O_3 for CO methanation , but a positive effect for CO_2 methanation.

关 键 词：一氧化碳 二氧化碳 甲烷化 钌催化剂 

分 类 号：TQ21[化学工程—有机化工]