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Effect of Promoters in Co-Mn-Al Mixed Oxide Catalyst on N2O Decomposition
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SYSNO ASEP 0343774 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Effect of Promoters in Co-Mn-Al Mixed Oxide Catalyst on N2O Decomposition Author(s) Karásková, K. (CZ)
Obalová, L. (CZ)
Jirátová, Květa (UCHP-M) RID, ORCID, SAI
Kovanda, F. (CZ)Source Title Chemical Engineering Journal. - : Elsevier - ISSN 1385-8947
Roč. 160, č. 2 (2010), s. 480-487Number of pages 8 s. Language eng - English Country NL - Netherlands Keywords nitrous oxide ; catalytic decomposition ; promoter effect Subject RIV CI - Industrial Chemistry, Chemical Engineering R&D Projects GA106/09/1664 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z40720504 - UCHP-M (2005-2011) UT WOS 000279137900012 DOI 10.1016/j.cej.2010.03.058 Annotation Catalytic decomposition of N2O over calcined Co-Mn-Al layered double hydroxide (LDH) modified with slight amount of alkali (Li, Na, K), rare earth (La, Ce), or noble metals (Pd, Pt) was studied. The method of preparation (impregnation, coprecipitation) affected the reducibility of the obtained mixed oxide catalysts but its effect on the surface area (with the exception of a cerium-contained sample) and N2O conversion was less evident. The modification of the Co-Mn-Al mixed oxide with K or Na increased N2O conversion, while no effect or a decrease in the N2O conversion was observed over the other examined catalysts. Alkali metals act as electron promoters; therefore, the differences in catalytic activity may be related to changes of oxygen-transition metal bond strength. The Co-Mn-Al mixed oxides with 1.8 wt% K exhibited a high catalytic activity even under the simultaneous presence of O2, H2O and NOx. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2011
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