Please use this identifier to cite or link to this item: http://dx.doi.org/10.14279/depositonce-11207
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dc.contributor.authorSun, Yu-
dc.contributor.authorHess, Franziska-
dc.contributor.authorDjerdj, Igor-
dc.contributor.authorWang, Zheng-
dc.contributor.authorWeber, Tim-
dc.contributor.authorGuo, Yanglong-
dc.contributor.authorSmarsly, Bernd M.-
dc.contributor.authorOver, Herbert-
dc.date.accessioned2021-01-07T12:58:10Z-
dc.date.available2021-01-07T12:58:10Z-
dc.date.issued2020-09-09-
dc.identifier.issn1867-3880-
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/12367-
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-11207-
dc.description.abstractDeactivation of CeO2‐based catalysts in the HCl oxidation reaction proceeds via selective bulk chlorination of the active CeO2 component to form CeCl3×nH2O. We study the reactivation of two bulk‐chlorinated CeO2‐based Deacon catalysts by oxygen treatment at 430 °C, namely pure CeO2 and 20 mol % of CeO2 supported on preformed ZrO2 particles (20CeO2@ZrO2), with a dedicated experiment. In the flow reactor setup we determine in‐situ the degree of chlorination of the catalyst by quantifying down‐stream with in‐situ UV‐Vis spectroscopy the total amount of chlorine in the catalyst that is exchanged by reoxidation at 430 °C. The activity of deactivated 20CeO2@ZrO2 can be fully restored by oxygen exposure at 430 °C, while that of pure CeO2 declines steadily. Since the UV‐Vis analytics is fast and sensitive, we can follow the kinetics of reoxidation. To rationalize the observed kinetics, we develop a modified Johnson‐Mehl‐Avrami‐Kolmogorov (JMAK) model based on a nucleation‐and‐growth approach for the reoxidation of the catalyst starting from the chlorinated phase. The fast reoxidation kinetics of chlorinated 20CeO2@ZrO2 is traced to a fast nucleation rate.en
dc.language.isoenen
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subject.ddc540 Chemie und zugeordnete Wissenschaftende
dc.subject.otherDeacon reactionen
dc.subject.otherstabilityen
dc.subject.otherreactivationen
dc.subject.otherin situ experimenten
dc.subject.otherAvrami modellingen
dc.titlesReactivation of CeO2‐based Catalysts in the HCl Oxidation Reaction: In situ Quantification of the Degree of Chlorination and Kinetic Modelingen
dc.typeArticleen
dc.date.updated2020-12-07T13:19:35Z-
tub.accessrights.dnbfreeen
tub.publisher.universityorinstitutionTechnische Universität Berlinen
dc.identifier.eissn1867-3899-
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.doi10.1002/cctc.202000907en
dcterms.bibliographicCitation.journaltitleChemCatChemen
dcterms.bibliographicCitation.originalpublisherplaceNew York, NYen
dcterms.bibliographicCitation.volume12en
dcterms.bibliographicCitation.pageend5522en
dcterms.bibliographicCitation.pagestart5511en
dcterms.bibliographicCitation.originalpublishernameWileyen
dcterms.bibliographicCitation.issue21en
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