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J Environ Manage. 2019 Jun 1;239:17-22. doi: 10.1016/j.jenvman.2019.02.118. Epub 2019 Mar 13.

CuO modified vanadium-based SCR catalysts for Hg0 oxidation and NO reduction.

Author information

1
National Institute of Clean-and-Low-Carbon Energy (NICE), Beijing, 102209, China.
2
National Institute of Clean-and-Low-Carbon Energy (NICE), Beijing, 102209, China. Electronic address: wangbaodong@nicenergy.com.

Abstract

The catalytic performance of Hg0 oxidation over vanadium-based SCR catalysts modified by different addition amounts of CuO was investigated. All catalysts were prepared by impregnation method and characterized. The 7% Cu/VWTi exhibited high Hg0 oxidation as well as a desired NO removal efficiency at 280-360 °C. The characterization revealed the enhancement of redox properties and well-dispersed active species results in the high catalytic performance after modification. The incorporation model showed that CuO in 7% Cu/VWTi was present in the monolayer dispersion, leading to the highest performance. Moreover, the effects of O2, NO, SO2, NH3 and HCl were explored. It showed all flue gas except NH3 could promote Hg0 oxidation. Fortunately, the inhibiting effect of NH3 could be scavenged if the catalyst is installed at the downstream of the SCR reactor. In addition, the mechanism of Hg0 oxidation over Cu/VWTi was discussed.

KEYWORDS:

Catalytic oxidation; CuO; Elemental mercury; Incorporation model; SCR

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