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Influence of the three way catalytic converter substrate cell density on the mass transfer and reaction resistances

2014-04-07Artigo científico Acesso restrito
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datacite.subject.sdg03:Saúde de Qualidade
datacite.subject.sdg07:Energias Renováveis e Acessíveis
datacite.subject.sdg11:Cidades e Comunidades Sustentáveis
dc.contributor.authorSantos, Helder
dc.contributor.authorCosta, Mário
dc.date.accessioned2026-06-09T09:22:59Z
dc.date.available2026-06-09T09:22:59Z
dc.date.issued2014-04-07
dc.description.abstractThe conversion of pollutants in automotive three way catalytic converter (TWC) channels is influenced by fluid mechanics, heat and mass transfer and catalytic reactions. The quantification of the total and relative importance of the physical and chemical phenomena involved is of major importance for the TWC performance optimization. In this paper, we present and implement a method to quantify the magnitudes of the external and internal mass transfer resistances as well as the chemical reaction resistance. The resistance quantification method was applied to analyze the influence of the TWC substrate cell density on the mass transfer and reaction resistances. Two TWCs with different cell density, referred to as TWC 200 cpsi and TWC 400 cpsi, were investigated. The experimental data were obtained under real world TWC operating conditions. For both TWCs and over the range of operating temperatures investigated the results reveal that (i) the magnitude of the reaction resistance is insignificant, (ii) the magnitude of the internal mass transfer resistance is higher than the magnitude of the external mass transfer resistance, and (iii) the washcoat thickness of the TWCs investigated (δC¼30 μm) is so high that limits the contact between the reactants and the PCM. A comparison between the two TWCs indicates that (i) the magnitude of the external mass transfer resistance for the TWC 200 cpsi is higher than that for the TWC 400 cpsi, and (ii) the magnitude of both the internal mass transfer and the reaction resistance for the TWC 200 cpsi is lower than those for the TWC 400 cpsi. The present study also demonstrates that, keeping constant both the PCM loading and the washcoat mass, a TWC with high cell density along with a thinner washcoat layer allows reducing simultaneously the external and internal mass transfer limitations, which may enhance further the TWC conversions.eng
dc.description.sponsorshipThis work was developed within the framework of project PTDC/EME-MFE/113683/2009, which is financially supported by Fundação para a Ciência e a Tecnologia.
dc.identifier.citationHelder Santos, Mário Costa, Influence of the three way catalytic converter substrate cell density on the mass transfer and reaction resistances, Chemical Engineering Science, Volume 107, 2014, Pages 181-191, ISSN 0009-2509, https://doi.org/10.1016/j.ces.2013.12.014
dc.identifier.doi10.1016/j.ces.2013.12.014
dc.identifier.issn0009-2509
dc.identifier.urihttp://hdl.handle.net/10400.8/16387
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier BV
dc.relation.hasversionhttps://www.sciencedirect.com/science/article/pii/S0009250913008099
dc.relation.ispartofChemical Engineering Science
dc.rights.uriN/A
dc.subjectExternal and internal mass transfer
dc.subjectExperimental characterization
dc.subjectThree way catalyst
dc.subjectConversions
dc.subjectResistances quantification
dc.subjectControlling regimes
dc.titleInfluence of the three way catalytic converter substrate cell density on the mass transfer and reaction resistanceseng
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage191
oaire.citation.startPage181
oaire.citation.titleChemical Engineering Science
oaire.citation.volume107
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameSantos
person.givenNameHelder
person.identifier.ciencia-id5C1B-81F4-0679
person.identifier.orcid0000-0001-6686-7991
person.identifier.ridM-1856-2014
person.identifier.scopus-author-id55778145336
relation.isAuthorOfPublication2b817169-78c2-4922-879a-02f1c40dafd9
relation.isAuthorOfPublication.latestForDiscovery2b817169-78c2-4922-879a-02f1c40dafd9

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