Study on simultaneous removal of NO and soot by Fe-doped La0.9Sr0.1Co1-xFexO3 catalyst

被引：0
|
作者：
Wei W. [1 ]
Qiao Z. [1 ]
Li S. [1 ]
Miao M. [1 ]
Liang H. [1 ]
Peng F. [1 ]
机构：
[1] Guangzhou Key Laboratory for New Energy and Green Catalysis, College of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, 510006, Guangdong
来源：
Huagong Xuebao/CIESC Journal | 2019年 / 70卷 / 12期
关键词：
Bench test; Catalysis; Fe-doping; Multiphase reaction; NO; Oxidation; Soot;
D O I：
10.11949/0438-1157.20190851
中图分类号：
学科分类号：
摘要：
The nano-perovskite catalyst La0.9Sr0.1Co1-xFexO3 was prepared by citric acid-EDTA complex method. The catalysts exhibit excellent catalytic activities for the simultaneous removal of NO and soot. Among them, the La0.9Sr0.1Co0.7Fe0.3O3 exhibits the best catalytic activity and wide activity window. The maximum NO conversion is 32.5% at 380.0℃, and the maximum soot combustion rate (Tm) is 368.5℃. The results of H2-TPR and NO-TPD indicate that the Fe-doping can significantly improve the reduction performance at the low temperature, surface oxygen species activity and NO adsorption performance of catalyst, leading to the enhancement of the catalytic activity. The XPS results show a strong interaction between Co and Fe. With increasing of Fe-doping, the surface adsorbed oxygen concentration and (Co4+) content could increase on the surface catalyst, it is essential to improve the catalytic oxidation ability. Based on the previous works, the commercial DPF carrier is used to coating the CeO2 coat, and the La0.9Sr0.1Co0.7Fe0.3O3 catalyst is further loaded to carry out the actual diesel engine bench test. The results show that the catalyst has good catalytic activity for simultaneous removal of NOx and soot. The best NO conversion can reach 23.0%, and the Tm was 341.0℃, indicating that the Fe-doping in the nano-perovskite catalysts can effectively improve the catalytic activity. It is expected that this study will provide strong theoretical support for the design and development of future four-way exhaust catalysts. © All Right Reserved.
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页码：4654 / 4663
页数：9
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