Surface versus bulk potassium promotion of Co4MnAlOx in direct NO decomposition

0558247 - ÚCHP 2023 SK eng C - Conference Paper (international conference)
Bílková, T. - Pacultová, K. - Karásková, K. - Fridrichová, D. - Jirátová, Květa - Koštejn, Martin - Słowik, G. - Obalová, L.
Surface versus bulk potassium promotion of Co4MnAlOx in direct NO decomposition.
Proceedings 48th International Conference of the Slovak Society of Chemical Engineering SSCHE 2022 and Membrane Conference PERMEA 2022. Bratislava: Faculty of Chemical and Food Technology STU, 2022 - (Mihaľ, M.), s. 1. ISBN 978-80-8208-070-7.
[International Conference of the Slovak Society of Chemical Engineering SSCHE 2022 and Membrane Conference PERMEA 2022 /48./. Tatranské Matliare (SK), 23.05.2022-26.05.2022]
Institutional support: RVO:67985858
Keywords : potassium promoter * Co-Mn-Al mixed oxide * NO decomposition
OECD category: Chemical process engineering

The most attractive way for NOx emissions abatement is direct catalytic decomposition to N2 and O2. Among many catalysts which have been already tested (metals,
metal oxides, mixed oxides, perovskites, zeolites etc.) for direct NO decomposition [1], Co-based mixed oxides modified by potassium showed high NO conversion and selectivity to N2 formation. Co4MnAlOx mixed oxide prepared by co-precipitation of corresponding nitrates and modified by K using two different methods (surface and bulk promotion) were prepared with the aim to study the effect of preparation method on physical, chemical and catalytic properties in direct NO decomposition. Using AAS, XPS, XRD, N2 physisorption, TEM, TPR H2, TPD CO2, TPD NO and catalytic measurements in steady state, the correlations were made and the comparison between samples modified by K via different procedures was performed.
Permanent Link: http://hdl.handle.net/11104/0331973