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Synthesis of Co doped MnO2 catalysts with the assist of PVP for low-temperature SCR

Abstract

The MnO2-CoOx catalysts with different Mn/Co ratio were prepared using Polyvinyl Pyrrolidone (PVP) as an assistant to control the morphology of composite oxides and exposure crystal faces. The physic-chemical properties of catalysts were systematically characterized, and the catalytic activity of NH3-SCR and resistance of SO2/H2O were investigated. It was found that the rod-shaped catalysts are obtained at various Mn/Co radio and Mn-Co-0.2-PVP catalysts show the best low-temperature SCR catalytic activity, resulting from (110) exposed crystal surface, enhanced the number of surface Lewis acid sites, strong adsorption strength and quantity of NH3 and NO. Furthermore, Mn-Co-0.2-PVP showed good resistance to H2O and SO2 poison owing to having more low temperature (~200℃) NO desorption sites, which are beneficial to promote the de-NOx reaction and less affected by SO2.

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Supplementary files

Article information


Submitted
18 Aug 2020
Accepted
09 Oct 2020
First published
13 Oct 2020

Catal. Sci. Technol., 2020, Accepted Manuscript
Article type
Paper

Synthesis of Co doped MnO2 catalysts with the assist of PVP for low-temperature SCR

H. Jiang, D. Kong, Y. Niu and S. Wang, Catal. Sci. Technol., 2020, Accepted Manuscript , DOI: 10.1039/D0CY01628D

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