| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Catalytic Performance of CoMn2O4/Ce-TiO2 Bifunctional Catalyst for the Simultaneous Removal of NOx and CO |
| TANG Xiaolong1,*, WEN Jiajun1, LIU Yuanyuan1, WANG Chengzhi2, LUO Ning1, DUAN Erhong3, ZHOU Yuansong1, YI Honghong1, GAO Fengyu1,*
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1 Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
2 Institute of Chemistry of Henan Academy of Sciences, Zhengzhou 450002, China
3 College of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China |
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Abstract Achieving ultra-low industrial flue gas emissions and synergistically controlling multiple pollutants are key tasks in air pollution management today. In this work, a loaded Mn-based spinel catalyst was used as a research object, and a bifunctional CoMn2O4/Ce-TiO2catalyst for low-temperature SCR denitrification and CO oxidation was developed through modification of Co and Ce. The impacts of different flue gas components on the efficiency of simultaneous denitrification and de-CO (decontamination of CO) were mainly investigated:SO2 inhibited denitrification and de-CO efficiency, whereas H2O lowered NOx conversion rate but enhanced CO conversion rate; CO and NH3 acted as a double reductant at lower concentrations, which jointly promoted the improvement of the NOx conversion rate, whereas the two caused a decrease of the CO conversion rate due to the competition for adsorption at higher concentrations. The analysis reveals that Mn was the primary active site in the SCR reaction, Co was the primary active site in the de-CO reaction, and Ce species played a role in both the SCR and de-CO reactions.The simultaneous denitrification and de-CO process eliminated NOx through the NH3-SCR reaction and CO through the oxidation reaction.
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Published: 10 March 2025
Online: 2025-03-18
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2025, Vol. 39 
