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Selective catalytic reduction of NO over W–Zr-O(x)/TiO(2): performance study of hierarchical pore structure
A series of W–Zr-O(x)/TiO(2) catalysts with hierarchical pore structure were prepared and used for selective catalytic reduction of NO by NH(3). Results showed that the 5C-WZ/T had a hierarchical pore structure, and exhibited high catalytic activity and good resistance to water and sulfur poisoning....
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9042316/ https://www.ncbi.nlm.nih.gov/pubmed/35497562 http://dx.doi.org/10.1039/d1ra05801k |
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author | Jin, Qijie Lu, Yao Ji, Wenyu Yang, Bo Xu, Mutao Xue, Zhiwei Dai, Yi Xu, Haitao |
author_facet | Jin, Qijie Lu, Yao Ji, Wenyu Yang, Bo Xu, Mutao Xue, Zhiwei Dai, Yi Xu, Haitao |
author_sort | Jin, Qijie |
collection | PubMed |
description | A series of W–Zr-O(x)/TiO(2) catalysts with hierarchical pore structure were prepared and used for selective catalytic reduction of NO by NH(3). Results showed that the 5C-WZ/T had a hierarchical pore structure, and exhibited high catalytic activity and good resistance to water and sulfur poisoning. The activity of the 5C-WZ/T catalyst was close to 100% in the range of 350–500 °C. The hierarchical pore structure not only improved the specific surface area, redox performance, and acid quantity, but also enabled the catalyst to expose more active sites and improved the catalytic performance. Although the reducing atmosphere caused by citric acid monohydrate reduced the chemical adsorption oxygen concentration, it increased the oxygen mobility and Ti(3+) ion concentration, which was more conducive to the improvement of catalytic activity. Finally, the NH(3)-SCR reaction over 5C-WZ/T catalyst followed L-H and E-R mechanisms. The monodentate nitrite, bidentate nitrate, gas-phase NO(2), coordinated NH(3) and NH(4)(+) were the main reaction intermediates. |
format | Online Article Text |
id | pubmed-9042316 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-90423162022-04-28 Selective catalytic reduction of NO over W–Zr-O(x)/TiO(2): performance study of hierarchical pore structure Jin, Qijie Lu, Yao Ji, Wenyu Yang, Bo Xu, Mutao Xue, Zhiwei Dai, Yi Xu, Haitao RSC Adv Chemistry A series of W–Zr-O(x)/TiO(2) catalysts with hierarchical pore structure were prepared and used for selective catalytic reduction of NO by NH(3). Results showed that the 5C-WZ/T had a hierarchical pore structure, and exhibited high catalytic activity and good resistance to water and sulfur poisoning. The activity of the 5C-WZ/T catalyst was close to 100% in the range of 350–500 °C. The hierarchical pore structure not only improved the specific surface area, redox performance, and acid quantity, but also enabled the catalyst to expose more active sites and improved the catalytic performance. Although the reducing atmosphere caused by citric acid monohydrate reduced the chemical adsorption oxygen concentration, it increased the oxygen mobility and Ti(3+) ion concentration, which was more conducive to the improvement of catalytic activity. Finally, the NH(3)-SCR reaction over 5C-WZ/T catalyst followed L-H and E-R mechanisms. The monodentate nitrite, bidentate nitrate, gas-phase NO(2), coordinated NH(3) and NH(4)(+) were the main reaction intermediates. The Royal Society of Chemistry 2021-10-12 /pmc/articles/PMC9042316/ /pubmed/35497562 http://dx.doi.org/10.1039/d1ra05801k Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/ |
spellingShingle | Chemistry Jin, Qijie Lu, Yao Ji, Wenyu Yang, Bo Xu, Mutao Xue, Zhiwei Dai, Yi Xu, Haitao Selective catalytic reduction of NO over W–Zr-O(x)/TiO(2): performance study of hierarchical pore structure |
title | Selective catalytic reduction of NO over W–Zr-O(x)/TiO(2): performance study of hierarchical pore structure |
title_full | Selective catalytic reduction of NO over W–Zr-O(x)/TiO(2): performance study of hierarchical pore structure |
title_fullStr | Selective catalytic reduction of NO over W–Zr-O(x)/TiO(2): performance study of hierarchical pore structure |
title_full_unstemmed | Selective catalytic reduction of NO over W–Zr-O(x)/TiO(2): performance study of hierarchical pore structure |
title_short | Selective catalytic reduction of NO over W–Zr-O(x)/TiO(2): performance study of hierarchical pore structure |
title_sort | selective catalytic reduction of no over w–zr-o(x)/tio(2): performance study of hierarchical pore structure |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9042316/ https://www.ncbi.nlm.nih.gov/pubmed/35497562 http://dx.doi.org/10.1039/d1ra05801k |
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