| Autor: |
Yuying Liu, Wei-bin Fan, LI Rui-feng, Yong He, Jinqiao Zhang |
| Rok vydání: |
2007 |
| Předmět: |
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| Zdroj: |
Journal of Fuel Chemistry and Technology. 35:452-457 |
| ISSN: |
1872-5813 |
| DOI: |
10.1016/s1872-5813(07)60028-0 |
| Popis: |
Selective catalytic reduction of NO by methane in the presence of excess oxygen over CoH-FBZ zeolite composite catalyst has an advantage over the physical mixture of CoH-Y and CoH-Beta. The interaction between NO or NO+O 2 and the catalyst revealed by adsorption and temperature-programmed desorption (TPD) technique, results directly in the effect of the topological structure of supports upon the stability of N- and O- species on the surface of the catalysts. The NO+O 2 -TPD profile of the CoH-FBZ catalyst exhibits two NO 2 desorption peaks at 630 K and 660 K, respectively. This indicates that new adsorption centers for –NO y are formed over the CoH-FBZ and adsorbed more stably on CoH-FBZ than on CoH-Y or CoH-Beta. The synergism of the newly formed Co sites and the new strong acidic sites contributes to the novel CH 4 -SCR catalytic properties of the CoH-FBZ catalysts. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect