Physicochemical properties and NH3-SCR catalytic performance of intercalated layered aluminosilicates

The representative of natural layered clays, bentonite, was modified according to two routes and tested as a new catalyst for selective catalytic reduction of nitrogen oxides with ammonia (NH3-SCR). The natural acid-activated clay was ion-exchanged with Na+ or remained in H-form and pillared with me...

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Autores: Szymaszek-Wawryca, Agnieszka, Díaz Morales, Urbano, Samojeden, Bogdan, Motak, Monika
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2023
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/364595
Acceso en línea:http://hdl.handle.net/10261/364595
Access Level:acceso abierto
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spelling Physicochemical properties and NH3-SCR catalytic performance of intercalated layered aluminosilicatesSzymaszek-Wawryca, AgnieszkaDíaz Morales, UrbanoSamojeden, BogdanMotak, MonikaThe representative of natural layered clays, bentonite, was modified according to two routes and tested as a new catalyst for selective catalytic reduction of nitrogen oxides with ammonia (NH3-SCR). The natural acid-activated clay was ion-exchanged with Na+ or remained in H-form and pillared with metal oxides. In order to limit the number of synthesis steps, iron as an active phase was introduced simultaneously with Al2O3 during the intercalation procedure. Additionally, the samples were doped with 0.5 wt% of copper to promote low-temperature activity. It was found that the performed modifications resulted in disorganization of the ordered layered arrangement of bentonite. Nevertheless, acid activation and pillaring improved structural and textural parameters. The results of catalytic tests indicated that the samples containing Fe2O3 pillars promoted with Cu exhibited the highest NO conversion of 85% at 250 °C (H-Bent-AlFe-Cu) and 75% at 300 °C (Na-Bent-AlFe-Cu). What is important, activity of the protonated samples in the high-temperature region was noticeably affected by the side reaction of ammonia oxidation, correlated with the production of NO and resulting in N2O emission during the process comparing to Na-Bentonite catalysts.PID2020-112590GB-C21Wrocław University of Science and TechnologyMinisterio de Ciencia e Innovación (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2024202420232024info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/364595reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-112590GB-C21http://dx.doi.org/10.37190/PPMP/171381Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3645952026-05-22T06:33:51Z
dc.title.none.fl_str_mv Physicochemical properties and NH3-SCR catalytic performance of intercalated layered aluminosilicates
title Physicochemical properties and NH3-SCR catalytic performance of intercalated layered aluminosilicates
spellingShingle Physicochemical properties and NH3-SCR catalytic performance of intercalated layered aluminosilicates
Szymaszek-Wawryca, Agnieszka
title_short Physicochemical properties and NH3-SCR catalytic performance of intercalated layered aluminosilicates
title_full Physicochemical properties and NH3-SCR catalytic performance of intercalated layered aluminosilicates
title_fullStr Physicochemical properties and NH3-SCR catalytic performance of intercalated layered aluminosilicates
title_full_unstemmed Physicochemical properties and NH3-SCR catalytic performance of intercalated layered aluminosilicates
title_sort Physicochemical properties and NH3-SCR catalytic performance of intercalated layered aluminosilicates
dc.creator.none.fl_str_mv Szymaszek-Wawryca, Agnieszka
Díaz Morales, Urbano
Samojeden, Bogdan
Motak, Monika
author Szymaszek-Wawryca, Agnieszka
author_facet Szymaszek-Wawryca, Agnieszka
Díaz Morales, Urbano
Samojeden, Bogdan
Motak, Monika
author_role author
author2 Díaz Morales, Urbano
Samojeden, Bogdan
Motak, Monika
author2_role author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia e Innovación (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
description The representative of natural layered clays, bentonite, was modified according to two routes and tested as a new catalyst for selective catalytic reduction of nitrogen oxides with ammonia (NH3-SCR). The natural acid-activated clay was ion-exchanged with Na+ or remained in H-form and pillared with metal oxides. In order to limit the number of synthesis steps, iron as an active phase was introduced simultaneously with Al2O3 during the intercalation procedure. Additionally, the samples were doped with 0.5 wt% of copper to promote low-temperature activity. It was found that the performed modifications resulted in disorganization of the ordered layered arrangement of bentonite. Nevertheless, acid activation and pillaring improved structural and textural parameters. The results of catalytic tests indicated that the samples containing Fe2O3 pillars promoted with Cu exhibited the highest NO conversion of 85% at 250 °C (H-Bent-AlFe-Cu) and 75% at 300 °C (Na-Bent-AlFe-Cu). What is important, activity of the protonated samples in the high-temperature region was noticeably affected by the side reaction of ammonia oxidation, correlated with the production of NO and resulting in N2O emission during the process comparing to Na-Bentonite catalysts.
publishDate 2023
dc.date.none.fl_str_mv 2023
2024
2024
2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/364595
url http://hdl.handle.net/10261/364595
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-112590GB-C21
http://dx.doi.org/10.37190/PPMP/171381
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Wrocław University of Science and Technology
publisher.none.fl_str_mv Wrocław University of Science and Technology
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)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
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