金属-ZSM-5/堇青石整体式催化剂上稀燃汽车尾气的净化

催化学报 , 2006, 27(1): 41-44.

金属-ZSM-5/堇青石整体式催化剂上稀燃汽车尾气的净化

李兰冬 ^1, , 章福祥 ^2, , 关乃佳 ^3, , 冯洪庆 ^4, , 刘德新 ^5,

1.南开大学新催化材料研究所,天津,300071

2.南开大学新催化材料研究所,天津,300071

3.南开大学新催化材料研究所,天津,300071

4.天津大学内燃机燃烧学国家重点实验室,天津,300072

5.天津大学内燃机燃烧学国家重点实验室,天津,300072

基金项目: 科技部科研项目(2003CB615801) 国家高技术研究发展计划(863计划)(20233030) 中国科学院资助项目(50322261)

关键词：铜 , ZSM-5 , 堇青石 , 稀燃 , 汽车尾气 , 贵金属

Metal-ZSM-5/Cordierite Monolithic Catalysts for Purifying Lean-Burn Engine Exhaust

在原位合成的ZSM-5/堇青石整体式样品基础上制备了几种金属(Cu, In或Ag)改性的ZSM-5/堇青石催化剂,并将其应用于稀燃发动机尾气的净化. 结果表明, Cu-ZSM-5/堇青石催化性能最好,尾气中的三种主要污染物NOx, CO和HC可以同时得到净化. 用微量(0.02%)贵金属(Pd, Rh或Ir)对Cu-ZSM-5/堇青石进一步改性,所得催化剂对CO的净化能力大大增强,保持高NOx转化率的温度窗口也大大加宽,因而该催化剂在稀燃汽车尾气净化方面具有潜在的应用前景. 微量贵金属对Cu-ZSM-5/堇青石催化剂的改性作用也在文中进行了讨论.

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