催化学报

催化学报 ›› 2008, Vol. 29 ›› Issue (4): 373-378.

• 研究论文 • 上一篇    下一篇

用于甲苯催化燃烧的Pd/Ce0.8Zr0.2O2/基底整体催化剂

张庆豹,赵雷洪,滕波涛,谢云龙,岳雷   

  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
  • 收稿日期:2008-04-25 出版日期:2008-04-25 发布日期:2012-03-22

Pd/Ce0.8Zr0.2O2/Substrate Monolithic Catalyst for Toluene Catalytic Combustion

ZHANG Qingbao, ZHAO Leihong*, TENG Botao, XIE Yunlong, YUE Lei   

  1. Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, Zhejiang, China
  • Received:2008-04-25 Online:2008-04-25 Published:2012-03-22

PDF

892

被引次数

9

摘要： 采用浸渍法制备了Pd/Ce0.8Zr0.2O2/基底整体催化剂,应用热重-差示扫描量热、扫描电镜、X射线衍射、氮吸附、拉曼光谱和程序升温还原等技术手段对催化剂进行了表征,考察了不同温度焙烧的整体催化剂的甲苯催化燃烧性能. 结果表明,一层均匀紧密的Ce0.8Zr0.2O2涂层很好地分散在基底表面上,该涂层具有良好的抗振荡性和较高的粘结强度. 400 ℃焙烧的Pd/Ce0.8Zr0.2O2/基底整体催化剂的催化活性最高,甲苯转化率达97%以上的最低反应温度为210 ℃. 此外, Pd/Ce0.8Zr0.2O2/基底整体催化剂具有良好的热稳定性,这可能是因为CeO2-ZrO2固溶体的形成和高温下PdO的稳定存在.

关键词: 整体催化剂, 甲苯, 催化燃烧, 涂层, 钯, 氧化铈, 氧化锆

Abstract: A novel Ce0.8Zr0.2O2 washcoat has been prepared by an impregnation method and used as a host for the active Pd component to prepare a Pd/Ce0.8Zr0.2O2/substrate monolithic catalyst for toluene catalytic combustion. Thermogravimetry and differential scanning calorimetry, scanning electron microscopy,X-raypowder diffraction, N2 adsorption, Raman spectroscopy, and CO temperature-programmed reduction have been used to characterize the catalyst. The washcoat is uniform and shows strong adhesion to the substrate according to an ultrasonic test. A toluene conversion of 97% is obtained at a temperature as low as 210 ℃ over the Pd/Ce0.8Zr0.2-O2/substrate monolithic catalyst calcined at 400 ℃. The formation of CeO2-ZrO2 solid solution and the presence of the stable PdO phase at high temperatures are primarily responsible for the good thermal stability of the monolithic catalyst.

Key words: monolithic catalyst, toluene, catalytic combustion, washcoat, palladium, ceria, zirconia