Effect of preparation method on catalytic properties of Co-Mn-Al mixed oxides for N2O decomposition

Kód výsledku v IS VaVaI

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RIV/61989100:27710/15:86097150 RIV/61989100:27730/15:86097150

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Effect of preparation method on catalytic properties of Co-Mn-Al mixed oxides for N2O decomposition

Popis výsledku v původním jazyce

The present article is dealing with comprehensive analysis of the effect of preparation method performance of Co-Mn-Al mixed oxide catalyst on the N2O decomposition. Co-Mn-Al mixed oxides were prepared by three different methods: (i) from hydrotalcite-like precursors (Co-Mn-Al-HT-ex), (ii) by calcination of corresponding nitrates (Co-Mn-Al-nitr) and (iii) by mechanochemical reaction of Co, Mn, Al nitrates with NH4HCO3 (Co-Mn-Al-carb). The Co:Mn:Al molar ratio of 4:1:1 was kept constant in all catalysts.The catalysts were charakterization by AAS, XRD, Raman, FTIR, H2-TPR, TPD of CO2 and NH3 and tested for N2O decomposition in inert gas and simulated waste gas from HNO3 production. The highest catalytic activity was achieved on the calcined precursors having carbonates in their molecules (Co-Mn-Al-carb and Co-Mn-Al-HT-ex), the lowest one on the calcined Co-Mn-Al nitrates due to the lower surface area, less advantageous porous structure and worse reducibility.

Název v anglickém jazyce

Effect of preparation method on catalytic properties of Co-Mn-Al mixed oxides for N2O decomposition

Popis výsledku anglicky

The present article is dealing with comprehensive analysis of the effect of preparation method performance of Co-Mn-Al mixed oxide catalyst on the N2O decomposition. Co-Mn-Al mixed oxides were prepared by three different methods: (i) from hydrotalcite-like precursors (Co-Mn-Al-HT-ex), (ii) by calcination of corresponding nitrates (Co-Mn-Al-nitr) and (iii) by mechanochemical reaction of Co, Mn, Al nitrates with NH4HCO3 (Co-Mn-Al-carb). The Co:Mn:Al molar ratio of 4:1:1 was kept constant in all catalysts.The catalysts were charakterization by AAS, XRD, Raman, FTIR, H2-TPR, TPD of CO2 and NH3 and tested for N2O decomposition in inert gas and simulated waste gas from HNO3 production. The highest catalytic activity was achieved on the calcined precursors having carbonates in their molecules (Co-Mn-Al-carb and Co-Mn-Al-HT-ex), the lowest one on the calcined Co-Mn-Al nitrates due to the lower surface area, less advantageous porous structure and worse reducibility.

Druh

O - Ostatní výsledky

CEP obor

CI - Průmyslová chemie a chemické inženýrství

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2015

Kód důvěrnosti údajů

C - Předmět řešení projektu podléhá obchodnímu tajemství (§ 504 Občanského zákoníku), ale název projektu, cíle projektu a u ukončeného nebo zastaveného projektu zhodnocení výsledku řešení projektu (údaje P03, P04, P15, P19, P29, PN8) dodané do CEP, jsou upraveny tak, aby byly zveřejnitelné.