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Analysis of Mn valence in the Mn based catalyst for NH3-SCR process

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DOI: 10.23977/metf.2018.21001 | Downloads: 29 | Views: 4241

Author(s)

Weizhe Lu 1, Xianji Zhou 1, Zhekai Zhang 1

Affiliation(s)

1 Institute of Catalytic Reaction Engineering, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China

Corresponding Author

Zhekai Zhang

ABSTRACT

A series of MnWOx/TiO2 catalysts were prepared by liquid phase deposition. The MnWOx/TiO2 catalyst was characterized by N2 physical adsorption, X-ray diffraction, H2 programmed temperature reduction, transmission electron microscopy and X-ray electron spectroscopy, and their NH3-SCR performance were tested. The effect of Mn valence on the NH3-SCR performance of MnWOx/TiO2 catalyst was analyzed and discussed. The results show that the active components are uniformly dispersed on the surface, and the average valence of manganese are different. The average valence state of manganese in Mn3WOx/TiO2 catalyst is the highest and the activity at low temperature is the best. On the contrary, the average valence of manganese in MnWOx/TiO2 catalyst is the lowest while the N2 selectivity is the best, which means that high valence of manganese is beneficial to its low temperature activity while low valence is favorable for its N2 selectivity.

KEYWORDS

NOx removal, Mn based catalyst, Valence, Low temperature activity, N2 selectivity.

CITE THIS PAPER

Weizhe, L., Xianji, Z., Zhekai, Z., Analysis of Mn valence in the Mn based catalyst for NH3-SCR process. Metallic foams (2018) 2: 60-68.

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