Improved Low‐Temperature Activity and H2 O Resistance of Fe‐Doped Mn−Eu Catalysts for NO Removal by NH3−SCR
Abstract Novel Mn−Eu−Fe catalysts were prepared via co‐precipitation method for NO x removal by selective catalytic reduction with NH3(NH3−SCR). The Mn−Eu−Fe(1)‐500 catalyst possessed the highest level of low‐temperature activity, giving 98 % NO conversion at 100 °C. This catalyst also exhibited excellent H2 O resistance capacity, even at a high gas hourly space velocity (GHSV) of 75,000 h−1. The NO conversion still maintained at approximately 90 % in the presence of 15 % H2 O at 230 °C after 50 h, and the adverse effects of H2 O could be quickly eliminated after the removal of H2 O. Detailed characterization and analysis indicated that strong interactions among Mn, Eu and Fe resulted in the excellent low‐temperature SCR activity and H2 O resistance of the Mn−Eu−Fe(1)‐500 catalyst. The strong interactions lead to larger specific surface area, higher concentrations of Mn4+, Fe3+ and Oα; improved redox properties, increased acid sites and acid strength, and more adsorption amounts of NO/NH3 in the presence of H2 O. The Mn−Eu−Fe(1)‐500 catalyst is a potential future catalyst for low‐temperature NO x removal derived from high‐H2 O‐content flue gases of natural gas combustion..
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2019 |
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| Erschienen: |
2019 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:11 |
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| Enthalten in: |
ChemCatChem - 11(2019), 19, Seite 4954-4965 |
| Beteiligte Personen: |
Guo, Mingyu [VerfasserIn] |
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| Anmerkungen: |
© 2019 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim |
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| Umfang: |
12 |
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| doi: |
10.1002/cctc.201900979 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| 520 | |a Abstract Novel Mn−Eu−Fe catalysts were prepared via co‐precipitation method for NO x removal by selective catalytic reduction with NH3(NH3−SCR). The Mn−Eu−Fe(1)‐500 catalyst possessed the highest level of low‐temperature activity, giving 98 % NO conversion at 100 °C. This catalyst also exhibited excellent H2 O resistance capacity, even at a high gas hourly space velocity (GHSV) of 75,000 h−1. The NO conversion still maintained at approximately 90 % in the presence of 15 % H2 O at 230 °C after 50 h, and the adverse effects of H2 O could be quickly eliminated after the removal of H2 O. Detailed characterization and analysis indicated that strong interactions among Mn, Eu and Fe resulted in the excellent low‐temperature SCR activity and H2 O resistance of the Mn−Eu−Fe(1)‐500 catalyst. The strong interactions lead to larger specific surface area, higher concentrations of Mn4+, Fe3+ and Oα; improved redox properties, increased acid sites and acid strength, and more adsorption amounts of NO/NH3 in the presence of H2 O. The Mn−Eu−Fe(1)‐500 catalyst is a potential future catalyst for low‐temperature NO x removal derived from high‐H2 O‐content flue gases of natural gas combustion. | ||
| 700 | 1 | |a Zhao, Peipei |4 aut | |
| 700 | 1 | |a Liu, Qingling |4 aut | |
| 700 | 1 | |a Liu, Caixia |4 aut | |
| 700 | 1 | |a Han, Jinfeng |4 aut | |
| 700 | 1 | |a Ji, Na |4 aut | |
| 700 | 1 | |a Song, Chunfeng |4 aut | |
| 700 | 1 | |a Ma, Degang |4 aut | |
| 700 | 1 | |a Lu, Xuebin |4 aut | |
| 700 | 1 | |a Liang, Xingyu |4 aut | |
| 700 | 1 | |a Li, Zhenguo |4 aut | |
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