| 金属-ZSM-5/堇青石整体式催化剂上稀燃汽车尾气的净化 |
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| 引用本文： | 李兰冬,章福祥,关乃佳,冯洪庆,刘德新.金属-ZSM-5/堇青石整体式催化剂上稀燃汽车尾气的净化[J].催化学报,2006,27(1):41-44. |
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| 作者姓名： | 李兰冬 章福祥 关乃佳 冯洪庆 刘德新 |
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| 作者单位： | 1. 南开大学新催化材料研究所,天津,300071
2. 天津大学内燃机燃烧学国家重点实验室,天津,300072 |
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| 基金项目： | 国家高技术研究发展计划(863计划);中国科学院资助项目;科技部科研项目 |
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| 摘 要： | 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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| 关 键 词： | 铜 ZSM-5 堇青石 稀燃 汽车尾气 贵金属 |
| 文章编号： | 0253-9837（2006）01-0041-04 |
| 收稿时间： | 05 13 2005 12:00AM |
| 修稿时间： | 2005-05-13 |
Metal-ZSM-5/Cordierite Monolithic Catalysts for Purifying Lean-Burn Engine Exhaust |
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| LI Landong,ZHANG Fuxiang,GUAN Naijia,FENG Hongqing,LIU Dexin.Metal-ZSM-5/Cordierite Monolithic Catalysts for Purifying Lean-Burn Engine Exhaust[J].Chinese Journal of Catalysis,2006,27(1):41-44. |
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| Authors: | LI Landong ZHANG Fuxiang GUAN Naijia FENG Hongqing LIU Dexin |
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| Institution: | 1.Institute of New Catalytic Materials Science, Nankai University, Tianjin 300071 , China ; 2.State Key Laboratory of Engine, Tianjin University, Tianjin 300072, China |
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| Abstract: | By in situ synthesis, the ZSM-5 zeolite grew on the cordierite substrate and formed ZSM-5/cordierite monolith. Metal (Cu, In or Ag)-modified ZSM-5/cordierites were studied as catalysts to treat the exhaust of lean-burn engine. Cu-ZSM-5/cordierite exhibited the best catalytic performance, and three main pollutants NO_x, CO and HC in the exhaust could be purified simultaneously. By further modification with a trace amount (0.02%) a noble metal (Pd, Rh or Ir), the purification ability of the catalysts for CO was greatly enhanced, and the temperature window of high NO_x conversion was greatly broadened. Bimetal modified ZSM-5/cordierites were then regarded as promising catalysts in purifying the lean-burn exhaust. The modification effect of the trace noble metal on the catalytic performance of Cu-ZSM-5/cordierite was also discussed. |
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| Keywords: | copper ZSM-5 cordierite lean-burn exhaust noble metal |
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