Ce、Zr双组分改性对Cu/ZSM-5催化剂催化分解NO性能的影响

阳鹏飞; 周继承; 王哲

Ce、Zr双组分改性对Cu/ZSM-5催化剂催化分解NO性能的影响

1.
湘潭大学化工学院"绿色催化与反应工程"湖南省高校重点实验室, 湖南湘潭 411105;
2.
南华大学化学化工学院, 湖南衡阳 421001

基金项目: 湖南省高校科技创新团队支持计划; 绿色催化与反应工程湖南省高校重点实验室开放基金(2009LC003);湖南省教育厅高等学校科学研究项目(11C1086)。

详细信息

通讯作者:
周继承,男,教授,Tel:13507323381。

中图分类号: O643.3
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出版历程
- 收稿日期: 2011-04-11
- 修回日期: 2011-07-26
- 刊出日期: 2012-04-30

Effect of Ce and Zr modification on the performance of Cu/ZSM-5 catalysts in direct decomposition of NO

1.
Key Laboratory of Green Catalysis and Chemical Reaction Engineering in College of Hunan Province, School of Chemistry and Chemical Engineering, Xiangtan University, Xiangtan 411105, China;
2.
School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China

摘要

摘要: 采用Ce、Zr双组分对Cu/ZSM-5催化剂进行改性,利用O₂-TPD和TG等手段对催化剂进行表征,考察了离子交换顺序、铈锆摩尔比以及反应条件对催化剂催化分解NO性能的影响。结果表明,铜物种是Zr-Cu-Ce/ZSM-5催化剂中催化分解NO的活性中心,是必须的催化活性组分,Ce、Zr双组分改性能显著提高催化剂在富氧条件下催化分解NO的活性,降低达到最高活性所需要的反应温度。铈锆摩尔比为1:1时,同时进行离子交换制备的Zr-Cu-Ce/ZSM-5催化剂催化分解NO的活性最好。
- 一氧化氮分解 /
- 改性 /
- 耐氧性 /
- 铈 /
- 锆
Abstract: Cu/ZSM-5 catalysts were modified by adding Ce and Zr components and then characterized by O₂-TPD and TG analysis. The effect of ion-exchange sequence, Ce/Zr mol ratio and reaction conditions on the catalytic performance of Ce and Zr modified Cu/ZSM-5 were investigated. The results indicated that Cu species is essential in Zr-Cu-Ce/ZSM-5 catalyst as the active sites for NO decomposition, while the modification with Ce and Zr components can significantly enhance its catalytic performance for direct decomposition of NO in the presence of oxygen and reduce the reaction temperature required for achieving the maximum conversion of NO. The Zr-Cu-Ce/ZSM-5 catalyst modified by simultaneous Ce and Zr ion-exchange with Ce/Zr mol ratio of 1 exhibits thehighest performance for NO decomposition.
- NO decomposition /
- modification /
- oxygen-resistance /
- ceria /
- zirconium

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参考文献(18)

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