CeO2 doping boosted low-temperature NH3-SCR activity of FeTiOx catalyst: A microstructure analysis and reaction mechanistic study
文献类型：期刊论文
| 作者 | Tan, Wei; Xie, Shaohua; Shan, Wenpo; Lian, Zhihua; Xie, Lijuan; Liu, Annai; Gao, Fei; Dong, Lin; He, Hong ; Liu, Fudong
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| 刊名 | FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
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| 出版日期 | 2022-05 |
| 卷号 | 16期号:5页码:60 |
| 关键词 | IRON TITANATE CATALYST REDUCTION NH3 NO SITES SCR PERFORMANCE CERIA |
| ISSN号 | 2095-2201 |
| 英文摘要 | FeTiOx has been recognized as an environmental-friendly and cost-effective catalyst for selective catalytic reduction (SCR) of NOx with NH3. Aimed at further improving the low-temperature DeNO(x) efficiency of FeTiOx catalyst, a simple strategy of CeO2 doping was proposed. The low-temperature ( < 250 degrees C) NH3 -SCR activity of FeTiOx catalyst could be dramatically enhanced by CeO2 doping, and the optimal composition of the catalyst was confirmed as FeCe0.2TiOx, which performed a NOx conversion of 90% at ca. 200 degrees C. According to X-ray diffraction (XRD), Raman spectra and X-ray absorption fine structure spectroscopy (XAFS) analysis, FeCe0.2TiOx showed low crystallinity, with Fe and Ce species well mixed with each other. Based on the fitting results of extended X-ray absorption fine structure (EXAFS), a unique Ce-O-Fe structure was formed in FeCe0.2TiOx catalyst. The well improved specific surface area and the newly formed Ce-O-Fe structure dramatically contributed to the improvement of the redox property of FeCe0.2TiOx catalyst, which was well confirmed by H-2-temperature-programmed reduction (H-2-TPR) and in situ XAFS experiments. Such enhanced redox capability could benefit the activation of NO and NH3 at low temperatures for NOx removal. The detailed reaction mechanism study further suggested that the facile oxidative dehydrogenation of NH3 to highly reactive-NH2 played a key role in enhancing the low-temperature NH3-SCR performance of FeCe0.2TiOx catalyst. (C) Higher Education Press 2022 |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47389]  |
| 专题 | 生态环境研究中心_大气污染控制中心 |
| 通讯作者 | Liu, Fudong |
| 作者单位 | 1.Chinese Acad Sci, Inst Urban Environm, Key Lab Urban Pollutant Convers, Xiamen 361021, Peoples R China 2.Nanjing Univ, Key Lab Mesoscop Chem MOE, Sch Chem & Chem Engn,Ctr Modern Anal, Jiangsu Key Lab Vehicle Emiss Control,Sch Environ, Nanjing 210023, Peoples R China 3.Univ Cent Florida, NanoSci Technol Ctr NSTC, Dept Civil Environm & Construct Engn, Catalysis Cluster Renewable Energy & Chem Transfo, Orlando, FL 32816 USA 4.Sinopec Catalyst Co Ltd, Sinopec Grp, Inst Engn Technol, Beijing 101111, Peoples R China 5.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100085, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tan, Wei,Xie, Shaohua,Shan, Wenpo,et al. CeO2 doping boosted low-temperature NH3-SCR activity of FeTiOx catalyst: A microstructure analysis and reaction mechanistic study[J]. FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING,2022,16(5):60. |
| APA | Tan, Wei.,Xie, Shaohua.,Shan, Wenpo.,Lian, Zhihua.,Xie, Lijuan.,...&Liu, Fudong.(2022).CeO2 doping boosted low-temperature NH3-SCR activity of FeTiOx catalyst: A microstructure analysis and reaction mechanistic study.FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING,16(5),60. |
| MLA | Tan, Wei,et al."CeO2 doping boosted low-temperature NH3-SCR activity of FeTiOx catalyst: A microstructure analysis and reaction mechanistic study".FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING 16.5(2022):60. |
入库方式： OAI收割
来源：生态环境研究中心
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