A one-pot synthesis of Cu-modified Mn-rich MnSAPO-34 catalyst with excellent low temperature NH3-selective catalytic reduction performance and H2O resistance
| Autor: | Hansun Fang, Bichun Huang, Chenglong Yu, Huajun Huang, Meijuan Lu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Flue gas
General Chemical Engineering Inorganic chemistry One-pot synthesis chemistry.chemical_element Selective catalytic reduction 02 engineering and technology Manganese 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Copper Redox 0104 chemical sciences Catalysis chemistry 0210 nano-technology NOx |
| Zdroj: | Journal of Industrial and Engineering Chemistry. 95:252-259 |
| ISSN: | 1226-086X |
| DOI: | 10.1016/j.jiec.2020.12.029 |
| Popis: | A one-pot synthetic method was used to prepare copper (Cu)-modified manganese (Mn)-rich MnSAPO-34 catalysts, which were then used for NOx removal from stationary-source flue gas. The addition of Cu to these Mn-rich MnSAPO-34 catalysts significantly enhanced their low temperature (LT) selective catalytic reduction (SCR) activity and H2O resistance. The Mn0.4Cu0.05SAPO-34 catalysts demonstrated excellent LT NH3-SCR activity, with NOx removal being >90% from 160 to 300 °C. In addition, Mn0.4Cu0.05SAPO-34 catalysts exhibited high H2O resistance. This excellent performance was ascribed to strong synergistic effects between Mn4+ and isolated Cu2+ species in Mn0.4Cu0.05SAPO-34 catalysts, leading to suitable redox ability. The results of in situ FT-IR analysis indicated that LT-SCR reactions mainly proceeded by an Eley–Rideal reaction pathway at 200 °C in Cu-modified manganese-rich MnSAPO-34 catalysts. Thus, Mn0.4Cu0.05SAPO-34 was considered as a promising candidate for NOx removal from flue gas of stationary sources at low temperatures. |
| Databáze: | OpenAIRE |
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