Catalytic decomposition of nitrous oxide - evaluation of pilot plant results

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F20%3A10245665" target="_blank" >RIV/61989100:27710/20:10245665 - 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

Catalytic decomposition of nitrous oxide - evaluation of pilot plant results

Popis výsledku v původním jazyce

Results were presented (invited plenyry lecure) on on-line conference &quot;52. Polish Annual Conference on Catalysis&quot;, 25.-27.11.2020 (Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences), Krakow. Research of new catalysts for industrial application is a time-consuming and costly process. It is usually based on a large number of laboratory catalytic experiments, which provide feedback for the optimization of catalyst preparation procedure, chemical composition etc. In presented lecture, three cobalt mixed oxide deN2O catalysts with optimal content of alkali metals (K, Cs) were prepared in large scale, shaped into tablets and tested in a pilot plant reactor connected at the bypassed tail gas from the nitric production plant downstream the SCR NOx/NH3. High N2O conversion of 75 - 90 % at 450 oC (GHSV=11 000 m3 mbed-3 h-1) was achieved. However, different activity order of commercially prepared catalyst tablets compared to laboratory prepared catalyst grains was observed. This fact raised following questions: (i) What are the reasons for different activity order of commercially prepared catalyst tablets compared to laboratory prepared samples? (ii) Could our pilot-plant catalysts achieve higher activity (N2O conversions)? (iii) What are the theoretical limits of N2O conversions over catalyst tablets, and how to approach them? Catalytic experiments in kinetic regime, different characterization methods (XRD, TPR-H2, physisorption and chemical analysis), evaluation of kinetic parameters, internal effectiveness factor, and effective diffusion coefficients were utilized to answer these questions.

Název v anglickém jazyce

Catalytic decomposition of nitrous oxide - evaluation of pilot plant results

Popis výsledku anglicky

Results were presented (invited plenyry lecure) on on-line conference &quot;52. Polish Annual Conference on Catalysis&quot;, 25.-27.11.2020 (Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences), Krakow. Research of new catalysts for industrial application is a time-consuming and costly process. It is usually based on a large number of laboratory catalytic experiments, which provide feedback for the optimization of catalyst preparation procedure, chemical composition etc. In presented lecture, three cobalt mixed oxide deN2O catalysts with optimal content of alkali metals (K, Cs) were prepared in large scale, shaped into tablets and tested in a pilot plant reactor connected at the bypassed tail gas from the nitric production plant downstream the SCR NOx/NH3. High N2O conversion of 75 - 90 % at 450 oC (GHSV=11 000 m3 mbed-3 h-1) was achieved. However, different activity order of commercially prepared catalyst tablets compared to laboratory prepared catalyst grains was observed. This fact raised following questions: (i) What are the reasons for different activity order of commercially prepared catalyst tablets compared to laboratory prepared samples? (ii) Could our pilot-plant catalysts achieve higher activity (N2O conversions)? (iii) What are the theoretical limits of N2O conversions over catalyst tablets, and how to approach them? Catalytic experiments in kinetic regime, different characterization methods (XRD, TPR-H2, physisorption and chemical analysis), evaluation of kinetic parameters, internal effectiveness factor, and effective diffusion coefficients were utilized to answer these questions.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20700 - Environmental engineering

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

2020

Kód důvěrnosti údajů

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