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| BaFeO3-x与Cu-ZSM-5耦合催化剂的NOx储存还原性能 | |
| 引用本文： | 吕姣龙,李锋丽,李新刚.BaFeO3-x与Cu-ZSM-5耦合催化剂的NOx储存还原性能[J].物理化学学报,2001,30(8):1550-1558. |
| 作者姓名： | 吕姣龙 李锋丽 李新刚 |
| 作者单位： | 1. 天津大学, 化工学院, 天津市应用催化科学与工程重点实验室, 天津 300072; 2. 天津化学化工协同创新中心, 天津 300072 |
| 基金项目： | 国家自然科学基金（U1162103,U1232118）,教育部新世纪优秀人才支持计划（NCET-10-0615）及教育部留学归国人员科研启动基金（2011-1568）资助项目 |
| 摘 要： | 为替代传统的贵金属基NOx储存还原（NSR）催化剂,本文设计并制备了不含贵金属的BaFeO3-x+Cu-ZSM-5 耦合催化剂,用于催化消除稀燃发动机尾气中的NOx. 在稀燃阶段,NO在BaFeO3-x催化剂上发生了氧化和储存反应;在富燃阶段,从BaFeO3-x催化剂中脱附出来未能消除的NOx被置于其后的Cu-ZSM-5催化剂进一步催化消除. 实验结果表明,BaFeO3-x+Cu-ZSM-5 耦合催化剂的工作温度窗口被拓宽到250-400 ℃,同时NOx消除性能得到了显著提高：NOx转化率最高可达98%,N2选择性接近100%. |
| 关 键 词： | 稀燃 耦合催化剂 氮氧化物 储存 还原 |
| 收稿时间： | 2014-04-11 |
| 修稿时间： | 2014-06-03 |
NOx Storage Reduction Performance of Coupled BaFeO3-x+Cu-ZSM-5 Catalyst |
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| Lü,Jiao-Long,LI Feng-Li,LI Xin-Gang.NOx Storage Reduction Performance of Coupled BaFeO3-x+Cu-ZSM-5 Catalyst[J].Acta Physico-Chimica Sinica,2001,30(8):1550-1558. | |
| Authors: | Lü Jiao-Long LI Feng-Li LI Xin-Gang |
| Institution: | 1. Tianjin Key Laboratory of Applied Catalysis Science & Technology, School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, P. R. China; 2. The Collaborative Innovation Center of Chemistry and Chemical Engineering of Tianjin, Tianjin 300072, P. R. China |
| Abstract: | A BaFeO3-x+Cu-ZSM-5 coupled catalyst was designed and synthesized to eliminate the NOx emitted from lean-burn exhausts, providing an alternative to the traditional noble-metal-based NOx storage reduction (NSR) catalysts. During the lean-burn period, the NO oxidation and storage processes mainly occurred over the BaFeO3-x catalyst. During the fuel-rich period, the released NOx from the BaFeO3-x catalyst was further reduced over the Cu-ZSM-5 catalyst. Our results show that, compared with the BaFeO3-x and Cu-ZSM-5 catalyst alone, the operating temperature window of the coupled BaFeO3-x+Cu-ZSM-5 catalyst is extended from 250 to 400 ℃, and its NOx elimination performance is significantly improved. The maximum NOx conversion of the coupled catalyst was 98%, while the N2 selectivity was close to 100%. |
| Keywords: | Lean-burn Coupled catalyst x' ') NOx" target="_blank">">NOx Storage Reduction |
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