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The synergy between manganese oxide and iron oxide in NO catalytic removal with MnFeOx/SiO2 catalyst

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Abstract

The catalytic NO removal efficiencies of MnFeOx/SiO2 catalysts with different Fe/Si were compared and studied. The reaction pathway analysis of NH3-SCR on the surface of MnFeOx/SiO2 catalyst was performed based on DFT calculations. The experimental results of catalytic activity show that the addition of an appropriate amount of iron oxide has significant improvement for the NO conversion from 240 °C to 330 °C and the N2 selectivity from 150 °C to 330 °C. The XRD test also shows that the addition of iron oxide can greatly improve the dispersion of MnO2. In addition, DFT calculations indicate that the main process of N2 formation is the NH2NO decomposition and N-NO reaction. The N-NO reaction to form N2 is a unique reaction pathway possessed by MnFeOx/SiO2, which is the main reason for the high NO conversion and good N2 selectivity of MnFeOx/SiO2 catalyst and shows good synergy between manganese oxide and iron oxide.

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Acknowledgements

Financial support for this project from the National Nature Science Foundation of China (51276039) and the Research Subject of Environmental Protection Department of Jiangsu Province of China (2015008) are gratefully acknowledgment.

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Authors and Affiliations

  1. Key laboratory of Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing, 210096, China

    Shaochen Gu, Keting Gui, Dongdong Ren & Yuliang Wei

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  1. Shaochen Gu
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  2. Keting Gui
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  3. Dongdong Ren
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  4. Yuliang Wei
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Correspondence to Keting Gui.

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Gu, S., Gui, K., Ren, D. et al. The synergy between manganese oxide and iron oxide in NO catalytic removal with MnFeOx/SiO2 catalyst. Reac Kinet Mech Cat 132, 187–201 (2021). https://doi.org/10.1007/s11144-020-01890-w

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  • DOI: https://doi.org/10.1007/s11144-020-01890-w

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