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Ceria-tungsten-tin oxide catalysts with superior regeneration capacity after sulfur poisoning for NH3-SCR process
Liu, Jingjing; Shi, Xiaoyan; Lv, Zhihui; Yu, Yunbo; He, Hong
2022-04-19
Source PublicationCATALYSIS SCIENCE & TECHNOLOGY
ISSN2044-4753
Volume12Issue:8Pages:2471-2481
AbstractNowadays, there exists a trade-off between high-temperature thermal stability and low-temperature catalytic activity for metal oxide catalysts for the NH3-SCR reaction, which restricts the practical application of metal oxide catalysts on diesel vehicles for NOx emission control. In this work, we systematically investigated the relationship between catalytic performance and thermal durability over a novel Ce-W-Sn ternary oxide (CeWSnOx) catalyst by varying the calcination temperature over the range 500-900 degrees C. Instead of thermal deactivation, the NH3-SCR performance of the CeWSnOx catalyst was significantly improved by roasting treatment at temperatures as high as 800 degrees C. Additionally, in situ SO2 poisoning led to the loss of the low-temperature activity for the optimized CeWSnOx-800 catalyst. The superior thermal stability of the CeWSnOx-800 catalyst and the poor thermal stability of the formed sulfates, however, made full thermal regeneration of the sulfur-poisoned catalyst feasible below 700 degrees C. The anti-sintering characteristics, SO2 poisoning mechanism and thermal regeneration capacity after SO2 poisoning of the CeWSnOx-800 catalyst were explored in detail by different characterization methods. We expect that this study can shed some light on the development of Ce-based catalysts for NOx removal from diesel exhaust possessing high thermal stability, catalytic activity and SO2 tolerance.
Department大气环境与污染控制实验室 ; 大气环境与污染控制实验室
KeywordLOW-TEMPERATURE NH3-SCR NO OXIDATION CALCINATION TEMPERATURE THERMAL-DECOMPOSITION SO2 TOLERANCE ACTIVE-SITES REDUCTION SCR RESISTANCE NH3
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/47390
Collection大气环境与污染控制实验室
Corresponding AuthorHe, Hong
Affiliation1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100085, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Ctr Excellence Reg Atmospher Environm, Inst Urban Environm, Xiamen 361021, Peoples R China
Recommended Citation
GB/T 7714
Liu, Jingjing,Shi, Xiaoyan,Lv, Zhihui,et al. Ceria-tungsten-tin oxide catalysts with superior regeneration capacity after sulfur poisoning for NH3-SCR process[J]. CATALYSIS SCIENCE & TECHNOLOGY,2022,12(8):2471-2481.
APA Liu, Jingjing,Shi, Xiaoyan,Lv, Zhihui,Yu, Yunbo,&He, Hong.(2022).Ceria-tungsten-tin oxide catalysts with superior regeneration capacity after sulfur poisoning for NH3-SCR process.CATALYSIS SCIENCE & TECHNOLOGY,12(8),2471-2481.
MLA Liu, Jingjing,et al."Ceria-tungsten-tin oxide catalysts with superior regeneration capacity after sulfur poisoning for NH3-SCR process".CATALYSIS SCIENCE & TECHNOLOGY 12.8(2022):2471-2481.
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