Direct Decomposition of NO Over Co-Mn-Al Mixed Oxides: Effect of Ce and/or K Promotors

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F19%3A10242203" target="_blank" >RIV/61989100:27710/19:10242203 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.icct.cz/zakladni-informace/uvodni-slovo" target="_blank" >https://www.icct.cz/zakladni-informace/uvodni-slovo</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Direct Decomposition of NO Over Co-Mn-Al Mixed Oxides: Effect of Ce and/or K Promotors

Popis výsledku v původním jazyce

Alkali promoted Co-Mn-Al mixed oxides are active in direct decomposition of NO to N2 and O2. In this contribution, the effect of K and/or Ce on activity of Co-Mn-Al mixed oxides was studied, as presence of Ce could increase mobility of oxygen in the transition metals oxides. Potassium-modified catalysts were prepared by impregnation of the coprecipitated Co-Mn-Al or Co-Mn-Al-Ce wet cake precursors by KNO3. To increase the concentration of Co and K, the catalysts with Ce were impregnated by Co or (Co+K) nitrates and calcined at chosen temperature (500 or 700 oC). The catalysts were characterized by AAS, nitrogen physisorption (SBET), H2-TPR, XRD, and CO2-TPD. The catalysts pre-calcined at 700 oC were tested for direct NO decomposition in inert gas (650 oC, 0.5 g, 1000 ppm NO/N2, 49 ml min-1). Co-Mn-Al mixed oxides with 2 - 8 wt.% K (depending on the catalysts preparation), not containing Ce, are active in direct decomposition of NO. Despite assumption, cerium does not contribute to higher activity of the catalysts in the examined reaction.

Název v anglickém jazyce

Direct Decomposition of NO Over Co-Mn-Al Mixed Oxides: Effect of Ce and/or K Promotors

Popis výsledku anglicky

Alkali promoted Co-Mn-Al mixed oxides are active in direct decomposition of NO to N2 and O2. In this contribution, the effect of K and/or Ce on activity of Co-Mn-Al mixed oxides was studied, as presence of Ce could increase mobility of oxygen in the transition metals oxides. Potassium-modified catalysts were prepared by impregnation of the coprecipitated Co-Mn-Al or Co-Mn-Al-Ce wet cake precursors by KNO3. To increase the concentration of Co and K, the catalysts with Ce were impregnated by Co or (Co+K) nitrates and calcined at chosen temperature (500 or 700 oC). The catalysts were characterized by AAS, nitrogen physisorption (SBET), H2-TPR, XRD, and CO2-TPD. The catalysts pre-calcined at 700 oC were tested for direct NO decomposition in inert gas (650 oC, 0.5 g, 1000 ppm NO/N2, 49 ml min-1). Co-Mn-Al mixed oxides with 2 - 8 wt.% K (depending on the catalysts preparation), not containing Ce, are active in direct decomposition of NO. Despite assumption, cerium does not contribute to higher activity of the catalysts in the examined reaction.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/LM2018098" target="_blank" >LM2018098: Energetické využití odpadů a čištění plynů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

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