Deactivation and regeneration studies on Pd-containing medium pore zeolites as passive NOx adsorbers (PNAs) in cold-start applications

[EN] Two Pd-containing medium pore zeolite frameworks, MFI and MWW, have been evaluated as passive NOx adsorbers (PNAs) in automotive applications. The NOx adsorption/desorption behavior of Pd-containing standard ZSM-5 and MCM-22 zeolites with analogous physico-chemical properties (Si/Al similar to...

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Autores: Bello-Jurado, Estefanía, Corma Canós, Avelino|||0000-0002-2232-3527, Moliner Marin, Manuel|||0000-0002-5440-716X, Margarit Benavent, Vicente Juan, Gallego-Sánchez, Eva María, Schuetze, Frank, Hengst, Christoph
Tipo de recurso: artículo
Fecha de publicación:2020
País:España
Institución:Universitat Politècnica de València (UPV)
Repositorio:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
Idioma:inglés
OAI Identifier:oai:riunet.upv.es:10251/164226
Acceso en línea:https://riunet.upv.es/handle/10251/164226
Access Level:acceso abierto
Palabra clave:Medium-pore zeolites
Nitrogen oxides (NOx)
Selective catalytic reduction (SCR)
Passive NOx adsorbers (PNAs)
QUIMICA ORGANICA
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spelling Deactivation and regeneration studies on Pd-containing medium pore zeolites as passive NOx adsorbers (PNAs) in cold-start applicationsBello-Jurado, EstefaníaCorma Canós, Avelino|||0000-0002-2232-3527Moliner Marin, Manuel|||0000-0002-5440-716XMargarit Benavent, Vicente JuanGallego-Sánchez, Eva MaríaSchuetze, FrankHengst, ChristophMedium-pore zeolitesNitrogen oxides (NOx)Selective catalytic reduction (SCR)Passive NOx adsorbers (PNAs)QUIMICA ORGANICA[EN] Two Pd-containing medium pore zeolite frameworks, MFI and MWW, have been evaluated as passive NOx adsorbers (PNAs) in automotive applications. The NOx adsorption/desorption behavior of Pd-containing standard ZSM-5 and MCM-22 zeolites with analogous physico-chemical properties (Si/Al similar to 10-12, 1%wt Pd, crystal size of similar to 200-400 nm), has been first studied. Pd/ZSM-5 shows better low-temperature NOx capacity than Pd/MCM-22 (0.83 and 0.55 mu mol NOx/mu mol Pd), but, in contrast, Pd/MCM-22 is able to desorb NOx at remarkable lower temperatures (similar to 50 degrees C fewer). In order to evaluate the influence of the textural properties of the MWW-type materials on the NOx adsorption/desorption behavior, a delaminated DS-ITQ-2 and nano-MCM-22, have also been prepared. The deactivation of the different Pd-containing medium pore zeolites and their posterior regeneration have been systematically studied by subjecting the samples to CO-ageing treatments at different temperatures (from 150 to 650 degrees C) and hydrothermal treatments at 750 degrees C, respectively. Pd/ZSM-5 is able to almost fully recovery the former NOx adsorption capacity, whereas Pd/MWW materials only recuperate half of their initial NOx adsorption capacity, fact that can be explained by the larger critical sizes of part of the agglomerated metal particles on the external surface of these materials.This work has been supported by Umicore and by the Spanish Government through SEV-2016-0683 and RTI2018-101033-B-I00 (MCIU/AEI/FEDER, UE). E.B. acknowledges the Spanish Government-MCIU for a FPI scholarship. E.M.G. acknowledges "La Caixa -Severo Ochoa" International PhD Fellowships (call 2015). We thank I. Millet for technical assistance. The Electron Microscopy Service of the UPV is acknowledged for their help in sample characterization.ElsevierInstituto Universitario Mixto de Tecnología QuímicaUmicoreEuropean Regional Development FundMinisterio de Economía y CompetitividadFundació Bancària Caixa d'Estalvis i Pensions de BarcelonaAgencia Estatal de InvestigaciónRepositorio Institucional de la Universitat Politècnica de València Riunet20202020-08-01journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttps://riunet.upv.es/handle/10251/164226reponame:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valénciainstname:Universitat Politècnica de València (UPV)InglésengAgencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020 RTI2018-101033-B-I00 DISEÑO DE CATALIZADORES MULTIFUNCIONALES PARA LA CONVERSION EFICIENTE DE BIOGAS Y GAS NATURAL A HIDROCARBUROS DE INTERES INDUSTRIALMinisterio de Economía y Competitividad http://dx.doi.org/10.13039/501100003329 SEV-2016-0683open accesshttp://purl.org/coar/access_right/c_abf2Reconocimiento - No comercial - Sin obra derivada (by-nc-nd) http://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:riunet.upv.es:10251/1642262026-06-13T07:49:27Z
dc.title.none.fl_str_mv Deactivation and regeneration studies on Pd-containing medium pore zeolites as passive NOx adsorbers (PNAs) in cold-start applications
title Deactivation and regeneration studies on Pd-containing medium pore zeolites as passive NOx adsorbers (PNAs) in cold-start applications
spellingShingle Deactivation and regeneration studies on Pd-containing medium pore zeolites as passive NOx adsorbers (PNAs) in cold-start applications
Bello-Jurado, Estefanía
Medium-pore zeolites
Nitrogen oxides (NOx)
Selective catalytic reduction (SCR)
Passive NOx adsorbers (PNAs)
QUIMICA ORGANICA
title_short Deactivation and regeneration studies on Pd-containing medium pore zeolites as passive NOx adsorbers (PNAs) in cold-start applications
title_full Deactivation and regeneration studies on Pd-containing medium pore zeolites as passive NOx adsorbers (PNAs) in cold-start applications
title_fullStr Deactivation and regeneration studies on Pd-containing medium pore zeolites as passive NOx adsorbers (PNAs) in cold-start applications
title_full_unstemmed Deactivation and regeneration studies on Pd-containing medium pore zeolites as passive NOx adsorbers (PNAs) in cold-start applications
title_sort Deactivation and regeneration studies on Pd-containing medium pore zeolites as passive NOx adsorbers (PNAs) in cold-start applications
dc.creator.none.fl_str_mv Bello-Jurado, Estefanía
Corma Canós, Avelino|||0000-0002-2232-3527
Moliner Marin, Manuel|||0000-0002-5440-716X
Margarit Benavent, Vicente Juan
Gallego-Sánchez, Eva María
Schuetze, Frank
Hengst, Christoph
author Bello-Jurado, Estefanía
author_facet Bello-Jurado, Estefanía
Corma Canós, Avelino|||0000-0002-2232-3527
Moliner Marin, Manuel|||0000-0002-5440-716X
Margarit Benavent, Vicente Juan
Gallego-Sánchez, Eva María
Schuetze, Frank
Hengst, Christoph
author_role author
author2 Corma Canós, Avelino|||0000-0002-2232-3527
Moliner Marin, Manuel|||0000-0002-5440-716X
Margarit Benavent, Vicente Juan
Gallego-Sánchez, Eva María
Schuetze, Frank
Hengst, Christoph
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Instituto Universitario Mixto de Tecnología Química
Umicore
European Regional Development Fund
Ministerio de Economía y Competitividad
Fundació Bancària Caixa d'Estalvis i Pensions de Barcelona
Agencia Estatal de Investigación
Repositorio Institucional de la Universitat Politècnica de València Riunet
dc.subject.none.fl_str_mv Medium-pore zeolites
Nitrogen oxides (NOx)
Selective catalytic reduction (SCR)
Passive NOx adsorbers (PNAs)
QUIMICA ORGANICA
topic Medium-pore zeolites
Nitrogen oxides (NOx)
Selective catalytic reduction (SCR)
Passive NOx adsorbers (PNAs)
QUIMICA ORGANICA
description [EN] Two Pd-containing medium pore zeolite frameworks, MFI and MWW, have been evaluated as passive NOx adsorbers (PNAs) in automotive applications. The NOx adsorption/desorption behavior of Pd-containing standard ZSM-5 and MCM-22 zeolites with analogous physico-chemical properties (Si/Al similar to 10-12, 1%wt Pd, crystal size of similar to 200-400 nm), has been first studied. Pd/ZSM-5 shows better low-temperature NOx capacity than Pd/MCM-22 (0.83 and 0.55 mu mol NOx/mu mol Pd), but, in contrast, Pd/MCM-22 is able to desorb NOx at remarkable lower temperatures (similar to 50 degrees C fewer). In order to evaluate the influence of the textural properties of the MWW-type materials on the NOx adsorption/desorption behavior, a delaminated DS-ITQ-2 and nano-MCM-22, have also been prepared. The deactivation of the different Pd-containing medium pore zeolites and their posterior regeneration have been systematically studied by subjecting the samples to CO-ageing treatments at different temperatures (from 150 to 650 degrees C) and hydrothermal treatments at 750 degrees C, respectively. Pd/ZSM-5 is able to almost fully recovery the former NOx adsorption capacity, whereas Pd/MWW materials only recuperate half of their initial NOx adsorption capacity, fact that can be explained by the larger critical sizes of part of the agglomerated metal particles on the external surface of these materials.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020-08-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://riunet.upv.es/handle/10251/164226
url https://riunet.upv.es/handle/10251/164226
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Agencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020 RTI2018-101033-B-I00 DISEÑO DE CATALIZADORES MULTIFUNCIONALES PARA LA CONVERSION EFICIENTE DE BIOGAS Y GAS NATURAL A HIDROCARBUROS DE INTERES INDUSTRIAL
Ministerio de Economía y Competitividad http://dx.doi.org/10.13039/501100003329 SEV-2016-0683
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Reconocimiento - No comercial - Sin obra derivada (by-nc-nd)
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Reconocimiento - No comercial - Sin obra derivada (by-nc-nd)
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
instname:Universitat Politècnica de València (UPV)
instname_str Universitat Politècnica de València (UPV)
reponame_str RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
collection RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301603

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