CuO modified vanadium-based SCR catalysts for Hg 0 oxidation and NO reduction

• Published in: Journal of environmental management Vol. 239; p. 17
• Main Authors: Wang, Hongyan, Wang, Baodong, Zhou, Jiali, Li, Ge, Zhang, Daojun, Ma, Ziran, Xiong, Rihua, Sun, Qi, Xu, Wayne Qiang
• Format: Journal Article
• Language: English
• Published: England 01.06.2019
• Subjects: Incorporation model; Catalytic oxidation; Elemental mercury; SCR; CuO
• ISSN: 1095-8630
• DOI: 10.1016/j.jenvman.2019.02.118

The catalytic performance of Hg 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 Hg 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 O , NO, SO , NH and HCl were explored. It showed all flue gas except NH could promote Hg oxidation. Fortunately, the inhibiting effect of NH could be scavenged if the catalyst is installed at the downstream of the SCR reactor. In addition, the mechanism of Hg oxidation over Cu/VWTi was discussed.