Catalysts stability for NO decomposition reaction

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F24%3A10256129" target="_blank" >RIV/61989100:27710/24:10256129 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Catalysts stability for NO decomposition reaction

Popis výsledku v původním jazyce

This contribution was presented on CatPrep2024: 4th Summer School on Catalysts Preparation, Vogüé, Francie, 9. - 14. 6. 2024.Direct decomposition of NO is the most attractive as well as the most challenging NOx abatement process. This reaction is thermodynamically feasible, but due to the high activation energy, the measurable reaction rate can be achieved only at temperatures above 1000 o C. This problem could be solved by using the suitable catalysts. In our previous work, the alkali metals were evaluated as promoters which ensured the activity of the Co4MnAlOx mixed oxide catalyst. However, there are problems with low stability of these alkali metals at reaction temperatures above 500 oC caused by their volatilization. Different preparation methods affected the catalytic activity of K-doped Co4MnAlOx mixed oxide catalyst, but the stability of these catalysts is still questionable. Which catalyst is stable for NO decomposition and which is not? What time is suitable for the long-term stability testing of catalysts? Is the stability affected by the catalyst composition? The results depicted in Figure 1 indicate that higher stability can be achieved with potassium overloading. However, the drawback is that this solution must only be applied within the known optimal potassium range to avoid influencing catalyst activity.

Název v anglickém jazyce

Catalysts stability for NO decomposition reaction

Popis výsledku anglicky

This contribution was presented on CatPrep2024: 4th Summer School on Catalysts Preparation, Vogüé, Francie, 9. - 14. 6. 2024.Direct decomposition of NO is the most attractive as well as the most challenging NOx abatement process. This reaction is thermodynamically feasible, but due to the high activation energy, the measurable reaction rate can be achieved only at temperatures above 1000 o C. This problem could be solved by using the suitable catalysts. In our previous work, the alkali metals were evaluated as promoters which ensured the activity of the Co4MnAlOx mixed oxide catalyst. However, there are problems with low stability of these alkali metals at reaction temperatures above 500 oC caused by their volatilization. Different preparation methods affected the catalytic activity of K-doped Co4MnAlOx mixed oxide catalyst, but the stability of these catalysts is still questionable. Which catalyst is stable for NO decomposition and which is not? What time is suitable for the long-term stability testing of catalysts? Is the stability affected by the catalyst composition? The results depicted in Figure 1 indicate that higher stability can be achieved with potassium overloading. However, the drawback is that this solution must only be applied within the known optimal potassium range to avoid influencing catalyst activity.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10400 - Chemical sciences

Projekt

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Návaznosti

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Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů