摘要
本文用硝酸盐水溶液等量浸渍法制备了一系列Cr-Ag/γAl2O3双金属及单金属氧化物催化剂,测定了CO氧化转化率。用BET、XRD、TPR、TPDMS技术研究了助剂Ag对Cr/γ-Al2O3催化剂CO氧化反应的作用。结果表明,少量Ag的添加能明显提高Cr/γAl2O3催化剂对CO的氧化活性,且随Ag添加量的增加而增强。TPR和TPDMS实验发现,Ag的添加使催化剂的还原性能和表面氧性质发生明显变化,催化剂表面氧活动性增强。催化剂对CO的氧化活性与催化剂表面氧的活动性有很好的对应关系。
Aseries of γ Al 2 O 3 supported Cr Ag bimetallic and mono metallic cata lysts were prepared by wet impregnation mehtod The oxidation activity of CO was deter mined in a flow reactor system The effect of promoter Ag was studied by BET,XRD,TPR and TPD MS The result showed that the activity of Cr/γ Al 2 O 3 catalyst for CO oxidationwas evidently enhanced because of the addition of Ag,and increased with the content of Ag The promoter Ag could obviously change the reducibility and surface oxygen property of thecatalyst,and promote the oxygenous activity of catalyst CO oxidation activity of the cata lysts was correlated to their surface oxygen property
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
1997年第1期32-36,共5页
Journal of Fuel Chemistry and Technology
关键词
助剂
催化剂
氧化
镁
氧化物催化剂
promoter Ag,Cr/γ Al 2 O 3 catalyst,TPR,TPD MS,CO oxidation