CuO modified vanadium-based SCR catalysts for Hg0 oxidation and NO reduction
| Autor: | Daojun Zhang, Qi Sun, Baodong Wang, Li Ge, Wang Hongyan, Zhou Jiali, Rihua Xiong, Ma Ziran, Wayne Qiang Xu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Flue gas
Environmental Engineering Chemistry 0208 environmental biotechnology Inorganic chemistry Vanadium chemistry.chemical_element 02 engineering and technology General Medicine 010501 environmental sciences Management Monitoring Policy and Law 01 natural sciences Redox 020801 environmental engineering Catalysis Catalytic oxidation Monolayer No removal Dispersion (chemistry) Waste Management and Disposal 0105 earth and related environmental sciences |
| Zdroj: | Journal of Environmental Management. 239:17-22 |
| ISSN: | 0301-4797 |
| DOI: | 10.1016/j.jenvman.2019.02.118 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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