Hydrotalcite-Modified Clinoptilolite as the Catalyst for Selective Catalytic Reduction of NO with Ammonia (NH3-SCR)

[EN] A series of clinoptilolite-supported catalysts, modified with hydrotalcite-like phase (HT) by co-precipitation, were prepared and tested in NH3-SCR reactions. It was found that deposition of HT on clinoptilolite increased conversion of NO within 250-450 degrees C, and that the positive impact o...

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Autores: Szymaszek-Wawryca, Agnieszka, Summa, Paulina, Duraczynska, Dorota, Motak, Monika, Díaz, Urbano|||0000-0003-1472-8724
Tipo de recurso: artículo
Fecha de publicación:2022
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:10251/194992
Acceso en línea:https://riunet.upv.es/handle/10251/194992
Access Level:acceso abierto
Palabra clave:Hydrotalcite
Clinoptilolite
Co-precipitation
Iron
Copper
Mixed oxides
DeNO(x)
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spelling Hydrotalcite-Modified Clinoptilolite as the Catalyst for Selective Catalytic Reduction of NO with Ammonia (NH3-SCR)Szymaszek-Wawryca, AgnieszkaSumma, PaulinaDuraczynska, DorotaMotak, MonikaDíaz, Urbano|||0000-0003-1472-8724HydrotalciteClinoptiloliteCo-precipitationIronCopperMixed oxidesDeNO(x)[EN] A series of clinoptilolite-supported catalysts, modified with hydrotalcite-like phase (HT) by co-precipitation, were prepared and tested in NH3-SCR reactions. It was found that deposition of HT on clinoptilolite increased conversion of NO within 250-450 degrees C, and that the positive impact on the catalytic activity was independent of HT loading. The promoting effect of clinoptilolite was attributed to Bronsted acid sites present in the zeolite, which facilitated adsorption and accumulation of ammonia during the catalytic process. Concentration of N2O in the post-reaction gas mixture reached its maximum at 300 degrees C and the by-product was most likely formed as a consequence of NH4NO3 decomposition or side reaction of NH3 oxidation in the high-temperature region. The gradual elimination of nitrous oxide, noticed as the material with the highest concentration of hydrotalcite phase, was attributed to the abundance of oligomeric iron species and the superior textural parameters of the material. UV-Vis experiments performed on the calcined samples indicated that Fe sites of higher nuclearity were generated by thermal decomposition of the hydrotalcite phase during the catalytic reaction. Therefore, calcination of the materials prior to the catalytic tests was not required to obtain satisfactory overall catalytic performance in NO reductions.Agnieszka Szymaszek-Wawryca would like to gratefully acknowledge financial support from National Science Centre (Grant Preludium 19, no. 2020/37/N/ST5/00186). Urbano Diaz acknowledges financial support from Government of Spain through the project PID2020-112590GB C21/AEI/10.13039/501100011033. The work of Monika Motak was supported by the program "Excellence initiative-research university" for AGH University of Science and Technology.MDPI AGInstituto Universitario Mixto de Tecnología QuímicaNational Science Centre, PoloniaAgencia Estatal de InvestigaciónAGH University of Science and Technology, PoloniaRepositorio Institucional de la Universitat Politècnica de València Riunet20222022-11-01journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://riunet.upv.es/handle/10251/194992reponame: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 PID2020-112590GB-C21 MATERIALES HIBRIDOS DE BAJA DIMENSIONALIDAD CON MORFOLOGIA, ESTRUCTURACION Y REACTIVIDAD CONTROLABLE PARA LLEVAR A CABO PROCESOS CATALITICOS Y NANOTECNOLOGICOSNational Science Centre, Polonia https://doi.org/10.13039/501100004281 2020%2F37%2FN%2FST5%2F00186open accesshttp://purl.org/coar/access_right/c_abf2Reconocimiento (by)http://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:riunet.upv.es:10251/1949922026-06-13T07:49:27Z
dc.title.none.fl_str_mv Hydrotalcite-Modified Clinoptilolite as the Catalyst for Selective Catalytic Reduction of NO with Ammonia (NH3-SCR)
title Hydrotalcite-Modified Clinoptilolite as the Catalyst for Selective Catalytic Reduction of NO with Ammonia (NH3-SCR)
spellingShingle Hydrotalcite-Modified Clinoptilolite as the Catalyst for Selective Catalytic Reduction of NO with Ammonia (NH3-SCR)
Szymaszek-Wawryca, Agnieszka
Hydrotalcite
Clinoptilolite
Co-precipitation
Iron
Copper
Mixed oxides
DeNO(x)
title_short Hydrotalcite-Modified Clinoptilolite as the Catalyst for Selective Catalytic Reduction of NO with Ammonia (NH3-SCR)
title_full Hydrotalcite-Modified Clinoptilolite as the Catalyst for Selective Catalytic Reduction of NO with Ammonia (NH3-SCR)
title_fullStr Hydrotalcite-Modified Clinoptilolite as the Catalyst for Selective Catalytic Reduction of NO with Ammonia (NH3-SCR)
title_full_unstemmed Hydrotalcite-Modified Clinoptilolite as the Catalyst for Selective Catalytic Reduction of NO with Ammonia (NH3-SCR)
title_sort Hydrotalcite-Modified Clinoptilolite as the Catalyst for Selective Catalytic Reduction of NO with Ammonia (NH3-SCR)
dc.creator.none.fl_str_mv Szymaszek-Wawryca, Agnieszka
Summa, Paulina
Duraczynska, Dorota
Motak, Monika
Díaz, Urbano|||0000-0003-1472-8724
author Szymaszek-Wawryca, Agnieszka
author_facet Szymaszek-Wawryca, Agnieszka
Summa, Paulina
Duraczynska, Dorota
Motak, Monika
Díaz, Urbano|||0000-0003-1472-8724
author_role author
author2 Summa, Paulina
Duraczynska, Dorota
Motak, Monika
Díaz, Urbano|||0000-0003-1472-8724
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Instituto Universitario Mixto de Tecnología Química
National Science Centre, Polonia
Agencia Estatal de Investigación
AGH University of Science and Technology, Polonia
Repositorio Institucional de la Universitat Politècnica de València Riunet
dc.subject.none.fl_str_mv Hydrotalcite
Clinoptilolite
Co-precipitation
Iron
Copper
Mixed oxides
DeNO(x)
topic Hydrotalcite
Clinoptilolite
Co-precipitation
Iron
Copper
Mixed oxides
DeNO(x)
description [EN] A series of clinoptilolite-supported catalysts, modified with hydrotalcite-like phase (HT) by co-precipitation, were prepared and tested in NH3-SCR reactions. It was found that deposition of HT on clinoptilolite increased conversion of NO within 250-450 degrees C, and that the positive impact on the catalytic activity was independent of HT loading. The promoting effect of clinoptilolite was attributed to Bronsted acid sites present in the zeolite, which facilitated adsorption and accumulation of ammonia during the catalytic process. Concentration of N2O in the post-reaction gas mixture reached its maximum at 300 degrees C and the by-product was most likely formed as a consequence of NH4NO3 decomposition or side reaction of NH3 oxidation in the high-temperature region. The gradual elimination of nitrous oxide, noticed as the material with the highest concentration of hydrotalcite phase, was attributed to the abundance of oligomeric iron species and the superior textural parameters of the material. UV-Vis experiments performed on the calcined samples indicated that Fe sites of higher nuclearity were generated by thermal decomposition of the hydrotalcite phase during the catalytic reaction. Therefore, calcination of the materials prior to the catalytic tests was not required to obtain satisfactory overall catalytic performance in NO reductions.
publishDate 2022
dc.date.none.fl_str_mv 2022
2022-11-01
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/10251/194992
url https://riunet.upv.es/handle/10251/194992
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 PID2020-112590GB-C21 MATERIALES HIBRIDOS DE BAJA DIMENSIONALIDAD CON MORFOLOGIA, ESTRUCTURACION Y REACTIVIDAD CONTROLABLE PARA LLEVAR A CABO PROCESOS CATALITICOS Y NANOTECNOLOGICOS
National Science Centre, Polonia https://doi.org/10.13039/501100004281 2020%2F37%2FN%2FST5%2F00186
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Reconocimiento (by)
http://creativecommons.org/licenses/by/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 (by)
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv MDPI AG
publisher.none.fl_str_mv MDPI AG
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 15,300724

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