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dc.contributor.authorTišler, Zdeněk
dc.contributor.authorKlegová, Anna
dc.contributor.authorSvobodová, Eliška
dc.contributor.authorŠafář, Jan
dc.contributor.authorStrejcová, Kateřina
dc.contributor.authorKohout, Jan
dc.contributor.authorŠlang, Stanislav
dc.contributor.authorPacultová, Kateřina
dc.contributor.authorRodríguez-Padrón, Daily
dc.contributor.authorBulánek, Roman
dc.date.accessioned2021-02-05T10:59:36Z
dc.date.available2021-02-05T10:59:36Z
dc.date.issued2020
dc.identifier.citationCatalysts. 2020, vol. 10, issue 12, art. no. 1398.cs
dc.identifier.issn2073-4344
dc.identifier.urihttp://hdl.handle.net/10084/142797
dc.description.abstractIn this work, we studied the effect of alkali-activated zeolite foams modifications on properties and catalytic activity of cobalt phases in the process of catalytic decomposition of N2O. The zeolite foam supports were prepared by alkali activation of natural zeolite followed by acid leaching and ion exchange. The cobalt catalysts were synthesised by a different deposition technique (direct ion exchange (DIE) and incipient wetness impregnation (IWI) method of cobalt on zeolite foams. For comparison, catalysts on selected supports were prepared and the properties of all were compared in catalytic tests in the pellet form and as crushed catalysts to determine the effect of internal diffusion. The catalysts and supports were in detail characterized by a variety of techniques. The catalyst activity strongly depended on the structure of support and synthesis procedure of a cobalt catalyst. Ion exchange method provided active phase with higher surface areas and sites with better reducibility, both of these factors contributed to higher N2O conversions of more than 80% at 450 degrees C. A large influence can also be attributed to the presence of alkali metals, in particular, potassium, which resulted in a modification of electronic and acid base properties of the cobalt oxide phase on the catalyst surface. The promotional effect of potassium is better reducibility of cobalt species.cs
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofseriesCatalystscs
dc.relation.urihttp://doi.org/10.3390/catal10121398cs
dc.rights© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license.cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectnatural zeolitecs
dc.subjectclinoptilolitecs
dc.subjectzeolite foamcs
dc.subjectalkali activationcs
dc.subjectcobalt catalystcs
dc.subjectN2O decompositioncs
dc.titleCobalt based catalysts on alkali-activated zeolite foams for N2O decompositioncs
dc.typearticlecs
dc.identifier.doi10.3390/catal10121398
dc.rights.accessopenAccesscs
dc.type.versionpublishedVersioncs
dc.type.statusPeer-reviewedcs
dc.description.sourceWeb of Sciencecs
dc.description.volume10cs
dc.description.issue12cs
dc.description.firstpageart. no. 1398cs
dc.identifier.wos000601704800001


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© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license.
Except where otherwise noted, this item's license is described as © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license.