NH₃-SCR Performance and Applicability of Mn-Based Spinels over TiO₂ Catalyst

Abstract:

A series of Mn-based spinels over TiO₂ catalysts have been prepared with the impregnation method. Catalysts were comprehensively characterized using XRD, FESEM, H₂-TPR, and the activity evaluation of NH₃-SCR, while long-time stability tests and the effect of H₂O on NH₃-SCR were also investigated. Meanwhile, K poisoning effect was studied by preparing K-doped catalysts (K-Mn/TiO₂, K-Cu-Mn/TiO₂, K-Mg-Mn/TiO₂ and K-Co-Mn/TiO₂). According to the characterizations, Cu-Mn/TiO₂, Mg-Mn/TiO₂ and Co-Mn/TiO₂ catalysts exhibited superior low-temperature SCR activity, stability, K resistance and H₂O resistance due to the formation of spinels (MgMn₂O₄, CoMn₂O₄, CuMn₂O₄).

• Periodical: Materials Science Forum (Volume 921)
• Pages: 29-34
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.921.29
• Online since: May 2018
• Authors: De Fang, Feng He, Xiao Qing Liu, Jun Lin Xie*
• Keywords: Applicability, Low Temperature, Mn-Based Spinel, NH₃-SCR

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