AgY zeolite as catalyst for the selective catalytic oxidation of NH3

Ag-exchanged Y zeolites (Si/Al = 2.5; Ag/Al = 0.30–0.95) have been tested in the NH–SCO reaction, the most promising method for the elimination of ammonia emissions, and deeply characterized before and after reaction by using a variety of techniques (XRD, TEM, UV–Vis, Ag NMR, XAS spectroscopies). Th...

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Autores: Martinez-Ortigosa, Joaquin, Lopes, Christian W., Agostini, Giovanni, Palomares Gimeno, Antonio Eduardo, Blasco, Teresa, Rey García, Fernando
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2021
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/268381
Acceso en línea:http://hdl.handle.net/10261/268381
Access Level:acceso abierto
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spelling AgY zeolite as catalyst for the selective catalytic oxidation of NH3Martinez-Ortigosa, JoaquinLopes, Christian W.Agostini, GiovanniPalomares Gimeno, Antonio EduardoBlasco, TeresaRey García, FernandoAg-exchanged Y zeolites (Si/Al = 2.5; Ag/Al = 0.30–0.95) have been tested in the NH–SCO reaction, the most promising method for the elimination of ammonia emissions, and deeply characterized before and after reaction by using a variety of techniques (XRD, TEM, UV–Vis, Ag NMR, XAS spectroscopies). The most active centres for the NH–SCO reaction are Ag nanoparticles (NPs) formed under reduction conditions and both activity and selectivity to N increase with the silver loading. The Ag NPs are dramatically modified under reaction conditions, being most of them dispersed resulting in small clusters and even atomically Ag cations, the latter accounting for around half silver atoms. The presence of water into the reaction feed promotes the dispersion and oxidation of silver nanoparticles, but the catalyst performance is only slightly affected. The results are fully consistent with the previously proposed i-SCR mechanism for NH–SCO reaction on silver catalysts.Financial support by the Ministerio de Ciencia e Innovación (MICINN) of Spain through the Severo Ochoa (SEV-2016-0683), RTI2018-101784-B-I00, RTI2018-09639-A-I00 and InnovaXN-26-2019 projects is gratefully acknowledged.Peer reviewedElsevier BVConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2022202220212022info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/268381reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-101784-B-I00info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-096399-A-I00info:eu-repo/grantAgraament/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/SEV-2016-0683http://dx.doi.org/10.1016/j.micromeso.2021.111230Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2683812026-05-22T06:33:51Z
dc.title.none.fl_str_mv AgY zeolite as catalyst for the selective catalytic oxidation of NH3
title AgY zeolite as catalyst for the selective catalytic oxidation of NH3
spellingShingle AgY zeolite as catalyst for the selective catalytic oxidation of NH3
Martinez-Ortigosa, Joaquin
title_short AgY zeolite as catalyst for the selective catalytic oxidation of NH3
title_full AgY zeolite as catalyst for the selective catalytic oxidation of NH3
title_fullStr AgY zeolite as catalyst for the selective catalytic oxidation of NH3
title_full_unstemmed AgY zeolite as catalyst for the selective catalytic oxidation of NH3
title_sort AgY zeolite as catalyst for the selective catalytic oxidation of NH3
dc.creator.none.fl_str_mv Martinez-Ortigosa, Joaquin
Lopes, Christian W.
Agostini, Giovanni
Palomares Gimeno, Antonio Eduardo
Blasco, Teresa
Rey García, Fernando
author Martinez-Ortigosa, Joaquin
author_facet Martinez-Ortigosa, Joaquin
Lopes, Christian W.
Agostini, Giovanni
Palomares Gimeno, Antonio Eduardo
Blasco, Teresa
Rey García, Fernando
author_role author
author2 Lopes, Christian W.
Agostini, Giovanni
Palomares Gimeno, Antonio Eduardo
Blasco, Teresa
Rey García, Fernando
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
description Ag-exchanged Y zeolites (Si/Al = 2.5; Ag/Al = 0.30–0.95) have been tested in the NH–SCO reaction, the most promising method for the elimination of ammonia emissions, and deeply characterized before and after reaction by using a variety of techniques (XRD, TEM, UV–Vis, Ag NMR, XAS spectroscopies). The most active centres for the NH–SCO reaction are Ag nanoparticles (NPs) formed under reduction conditions and both activity and selectivity to N increase with the silver loading. The Ag NPs are dramatically modified under reaction conditions, being most of them dispersed resulting in small clusters and even atomically Ag cations, the latter accounting for around half silver atoms. The presence of water into the reaction feed promotes the dispersion and oxidation of silver nanoparticles, but the catalyst performance is only slightly affected. The results are fully consistent with the previously proposed i-SCR mechanism for NH–SCO reaction on silver catalysts.
publishDate 2021
dc.date.none.fl_str_mv 2021
2022
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/268381
url http://hdl.handle.net/10261/268381
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-101784-B-I00
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-096399-A-I00
info:eu-repo/grantAgraament/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/SEV-2016-0683
http://dx.doi.org/10.1016/j.micromeso.2021.111230
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier BV
publisher.none.fl_str_mv Elsevier BV
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
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