摘要
运用TPR、SEM、XRD阶梯扫描及CO和CH4氧化活性测定等表征技术研究了CuO／γ-Al2O3催化剂及负PdO对催化剂性能的影响。结果表明，CuO／γ-Al2O3催化剂上引入不同含量的PdO，使TPR还原峰温依次下降;对载体上CuO平均晶粒大小的测定表明随PdO含量的增加，CuO平均晶粒逐渐减小;SEM对PdO-CuO/γ-Al2O3催化剂上Cu元素分布的面扫描测定方证实了随PdO含量的增加，催化剂上Cu元素的分布增多。由此可见，CuO／γ—Al2O3催化剂上引入PdO使催化剂氧化活性提高的原因是CuO晶粒细化所致。
The TPR. SEM, XRD stepping sean techniques,CO and CH4 oxidation activity measurement were used to study the structure and properties of CuO/γ-Al2O3 catalyst loading over PdO. Experimental result shown that the CuO/γ-Al2O3 catalyst loading over different content PdO makes the TPR peak temperature decrease. Measurement of average crystalline grain size for the camer γ-Al2O3 loading over CuO, also indicated PdO content increase progressively,CuO average crystalline grain change into thin, SEM measurement for Cu element distribution,further confirm PdO content increase, Cu element distribution grow in number and quantity.Thus it can be seen that CuO/γ-Al2O3 catalyst loading over PdO makes CuO average crytalline grain change into thin and causes oxidation activity increase.
基金
浙江省科委基金
关键词
晶粒细化
氧化
铜
铝
钯
催化剂
尾气净化
CuO/γ-Al2O3 PdO Oxidation activity Average crystalline grain change into thin
