Step response experiments of N2O catalytic decomposition over alkali doped Co-Mn-Al mixed oxide catalysts.

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Step response experiments of N2O catalytic decomposition over alkali doped Co-Mn-Al mixed oxide catalysts.

Popis výsledku v původním jazyce

The mechanism of the low temperature N2O catalytic decomposition was studied by the step response experiments. Co-Mn-Al mixed oxide catalysts modified with different amount of alkali promoters were tested; quadrupole mass spectrometer was used for N2O (m/z = 44), O2 (m/z = 32) and N2 (m/z = 28) detection. From the step response experiments after switching on of N2O (Fig. 1) it was found out that N2 desorption from the catalyst surface is very fast, suggesting that oxidation of surface sites by N2O molecule proceeds easily. On the contrary, O2 desorption was evaluated as the rate limiting step. It was found out that the N2O conversion increased with the increasing initial rate of O2 formation and that the differences in the initial rates of O2 formationare depended on the amount of alkali promoters. On the basis of step response experiments after switching off of N2O it was confirmed that the desorption of oxygen occurs by recombination of oxygen atoms; however Eley-Riedel mechanism (r

Název v anglickém jazyce

Step response experiments of N2O catalytic decomposition over alkali doped Co-Mn-Al mixed oxide catalysts.

Popis výsledku anglicky

The mechanism of the low temperature N2O catalytic decomposition was studied by the step response experiments. Co-Mn-Al mixed oxide catalysts modified with different amount of alkali promoters were tested; quadrupole mass spectrometer was used for N2O (m/z = 44), O2 (m/z = 32) and N2 (m/z = 28) detection. From the step response experiments after switching on of N2O (Fig. 1) it was found out that N2 desorption from the catalyst surface is very fast, suggesting that oxidation of surface sites by N2O molecule proceeds easily. On the contrary, O2 desorption was evaluated as the rate limiting step. It was found out that the N2O conversion increased with the increasing initial rate of O2 formation and that the differences in the initial rates of O2 formationare depended on the amount of alkali promoters. On the basis of step response experiments after switching off of N2O it was confirmed that the desorption of oxygen occurs by recombination of oxygen atoms; however Eley-Riedel mechanism (r

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)

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.