Pd-Ce_(0.4)Zr_(0.6)O_2直接涂覆的整体催化剂的甲苯催化燃烧性能  

Toluene Combustion over Pd-Ce_(0.4)Zr_(0.6)O_2 Directly Washcoated Monolithic Catalysts

作　　者：赵雷洪[1] 张庆豹[1] 罗孟飞[1] 滕波涛[1] 谢云龙[1] 

机构地区：[1]浙江师范大学物理化学研究所浙江省固体表面反应化学重点实验室,浙江金华321004

出　　处：《中国稀土学报》2007年第6期682-687,共6页Journal of the Chinese Society of Rare Earths

基　　金：浙江省自然科学基金项目(203147);国家自然科学基金项目(20473075)资助

摘　　要：采用浸渍法制备了Pd-Ce0.4Zr0.6O2/载体整体催化剂,考察了不同温度焙烧的催化剂的甲苯催化燃烧性能,并将SEM,Raman,BET,CO-TPR等表征结果与催化活性进行了有效的关联。结果表明,催化剂的涂层具有良好的抗振荡性能;400℃焙烧的Pd-Ce0.4Zr0.6O2/载体整体催化剂的催化活性最高,甲苯转化率为95%以上的最低反应温度为210℃;与400℃焙烧的催化剂相比,900℃焙烧的催化剂95%以上甲苯转化的所需的最低温度仅提高40℃,说明该催化剂具有良好的热稳定性。The Pd-CeO4 ZrO6 O2/substrate monolithic catalyst was prepared by an impregnation method. The catalytic activity for toluene combustion of the catalysts calcined at different temperatures was investigated. The results of SEM, Raman spectroscopy, BET, and CO-TPR were related to the catalytic activity reasonably. It was found that the washcoat had strong vibration-shock resistance. The Pd-Ce0.4Zr06 O2/substrate monolithic catalyst calcined at 400 ℃ exhibited the highest catalytic activity, over which toluene conversion is up to 95% at a temperature as low as 210℃. Furthermore, the lowest temperature for 95% toluene conversion was increased by 40 ℃ after the catalyst calcined at 900 ℃, indicating that the catalyst had good thermal stability.

关 键 词：甲苯催化燃烧 整体催化剂 Pd-Ce0.4Zr0.6O2 稀土 

分 类 号：O643.3[理学—物理化学]