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- Title
Study on the Effect of Fe Doping on SCR Activity and Reaction Mechanism of Mn–TiO<sub>2</sub> Catalysts.
- Authors
Zhang, Lixing; Liang, Lisi; Ma, Hongyue; Mi, Han; Zhang, Ziheng; Li, Yi; Xu, Qiang; Zhao, Chen; Chen, Jin; Qiao, Jiangyu; Cui, Zhongyi
- Abstract
Mn/TiO2 and Fe–Mn/TiO2 catalysts were prepared using the impregnation method to explore the effect of iron doping at low temperature on the catalytic oxidation of high concentration NO by manganese-based catalysts and the catalytic reaction mechanism. This study reveals that the Fe–Mn/TiO2 catalyst performed exceptionally well in catalyzing high concentration NO smelting flue gas within a temperature range of 30–170 °C. At 150 °C, the denitrification efficiency of Fe–Mn/TiO2 (0.3) catalyst was 97.7%. Characterization analysis revealed that the incorporation of iron increased the ratio of high valence manganese and surface chemisorbed oxygen, which promoted the dispersion of surface-active substances, ultimately leading to an increase in the specific surface area of the catalyst. These factors facilitated the adsorption and activation of NH3 as well as the oxidation of NO to NO2, thus increasing the low-temperature redox capacity of the catalyst. Meanwhile, the ammonia selective catalytic reduction (NH3-SCR) denitrification mechanism over Fe–Mn/TiO2 catalysts was consistent with the Eley–Rideal (E–R) and Langmuir–Hinshelwood (L–H) mechanisms under low-temperature reaction conditions.
- Subjects
CATALYSTS; CATALYTIC reduction; CATALYTIC oxidation; FLUE gases; LOW temperatures; METHANATION
- Publication
Catalysis Letters, 2024, Vol 154, Issue 6, p2777
- ISSN
1011-372X
- Publication type
Article
- DOI
10.1007/s10562-023-04524-7