Effect of preparation procedure and composition of catalysts based on Mn and Ce oxides in the simultaneous removal of NOX and o-DCB

[EN] Two series of catalysts based on Mn and Ce oxides were prepared by co-precipitation and impregnation, in order to study their physicochemical properties and catalytic performance in the simultaneous reduction of NO and oxidation of o-DCB. Co-precipitation catalysts showed better activity than t...

Descripción completa

Detalles Bibliográficos
Autores: Martín Martín, Juan Alberto, Sánchez Robles, Jerai, González Marcos, María Pilar, Aranzabal Maiztegi, Asier, González Velasco, Juan Ramón
Tipo de recurso: artículo
Fecha de publicación:2020
País:España
Institución:Universidad del País Vasco
Repositorio:Addi. Archivo Digital para la Docencia y la Investigación
OAI Identifier:oai:addi.ehu.eus:10810/71703
Acceso en línea:http://hdl.handle.net/10810/71703
Access Level:acceso abierto
Palabra clave:MnOX and CeO2
Co-precipitation
Impregnation
o-DCB
NH3-SCR
id ES_4fa9cdc088ea7a95ca6f1e398cce73fb
oai_identifier_str oai:addi.ehu.eus:10810/71703
network_acronym_str ES
network_name_str España
repository_id_str
spelling Effect of preparation procedure and composition of catalysts based on Mn and Ce oxides in the simultaneous removal of NOX and o-DCBMartín Martín, Juan AlbertoSánchez Robles, JeraiGonzález Marcos, María PilarAranzabal Maiztegi, AsierGonzález Velasco, Juan RamónMnOX and CeO2Co-precipitationImpregnationo-DCBNH3-SCR[EN] Two series of catalysts based on Mn and Ce oxides were prepared by co-precipitation and impregnation, in order to study their physicochemical properties and catalytic performance in the simultaneous reduction of NO and oxidation of o-DCB. Co-precipitation catalysts showed better activity than those prepared by impregnation because of the formation of a MnOX-CeO2 solid solution, which improves redox and acid properties. Moreover, the catalysts with MnOX content between 80 and 90 mol.%, in which a coexistence between solid solution phase and Mn2O3 crystal was found, presented NO conversion above 90 % at temperatures below 250 °C and o-DCB conversion above 80 % at temperatures above 200 °C. The main by-products of SCR were N2O, produced in the whole range of temperature, and NO2, formed at temperatures above 300 °C. Selectivity to CO2 above 80 % was obtained using co-precipitation catalysts in all temperature range. Deactivation experiments showed that oxidation reaction strongly contributes to deactivate impregnation catalysts, whereas the effect of deactivation is lower in co-precipitation catalysts at high Mn contents.[ES] Se prepararon dos series de catalizadores basados en óxidos de Mn y Ce por coprecipitación e impregnación, con el fin de estudiar sus propiedades fisicoquímicas y su rendimiento catalítico en la reducción simultánea de NO y la oxidación de o-DCB. Los catalizadores por co-precipitación mostraron mejor actividad que los preparados por impregnación debido a la formación de una solución sólida de MnOX-CeO2, que mejora las propiedades redox y ácidas. Además, los catalizadores con contenido de MnOX entre 80 y 90 mol.%, en los que se encontró una coexistencia entre la fase de solución sólida y el cristal de Mn2O3, presentaron una conversión de NO superior al 90 % a temperaturas inferiores a 250 °C y una conversión de o-DCB superior al 80 % a temperaturas superiores a 200 °C. Los principales subproductos de la SCR fueron el N2O, producido en todo el intervalo de temperaturas, y el NO2, formado a temperaturas superiores a 300 °C. Se obtuvo una selectividad al CO2 superior al 80 % utilizando catalizadores de coprecipitación en toda la gama de temperaturas. Los experimentos de desactivación mostraron que la reacción de oxidación contribuye en gran medida a desactivar los catalizadores de impregnación, mientras que el efecto de la desactivación es menor en los catalizadores de coprecipitación con altos contenidos de Mn.he authors thank MINECO/FEDER (CTQ2015-64616-P), The Basque Government (IT657-13 and IT1297-19) and the University of the Basque Country UPV/EHU (INF12/37, UFI 11/39) for the economic support. The author JAMM specially acknowledges MINECO/FEDER (BES-2016-077849) for the PhD grant.Elsevier202520252020info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10810/71703reponame:Addi. Archivo Digital para la Docencia y la Investigacióninstname:Universidad del País VascoIngléshttps://doi.org/10.1016/j.mcat.2020.111152info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0/© 2020 Elsevier under CC BY-NC-ND licenseoai:addi.ehu.eus:10810/717032026-06-18T09:23:17Z
dc.title.none.fl_str_mv Effect of preparation procedure and composition of catalysts based on Mn and Ce oxides in the simultaneous removal of NOX and o-DCB
title Effect of preparation procedure and composition of catalysts based on Mn and Ce oxides in the simultaneous removal of NOX and o-DCB
spellingShingle Effect of preparation procedure and composition of catalysts based on Mn and Ce oxides in the simultaneous removal of NOX and o-DCB
Martín Martín, Juan Alberto
MnOX and CeO2
Co-precipitation
Impregnation
o-DCB
NH3-SCR
title_short Effect of preparation procedure and composition of catalysts based on Mn and Ce oxides in the simultaneous removal of NOX and o-DCB
title_full Effect of preparation procedure and composition of catalysts based on Mn and Ce oxides in the simultaneous removal of NOX and o-DCB
title_fullStr Effect of preparation procedure and composition of catalysts based on Mn and Ce oxides in the simultaneous removal of NOX and o-DCB
title_full_unstemmed Effect of preparation procedure and composition of catalysts based on Mn and Ce oxides in the simultaneous removal of NOX and o-DCB
title_sort Effect of preparation procedure and composition of catalysts based on Mn and Ce oxides in the simultaneous removal of NOX and o-DCB
dc.creator.none.fl_str_mv Martín Martín, Juan Alberto
Sánchez Robles, Jerai
González Marcos, María Pilar
Aranzabal Maiztegi, Asier
González Velasco, Juan Ramón
author Martín Martín, Juan Alberto
author_facet Martín Martín, Juan Alberto
Sánchez Robles, Jerai
González Marcos, María Pilar
Aranzabal Maiztegi, Asier
González Velasco, Juan Ramón
author_role author
author2 Sánchez Robles, Jerai
González Marcos, María Pilar
Aranzabal Maiztegi, Asier
González Velasco, Juan Ramón
author2_role author
author
author
author
dc.subject.none.fl_str_mv MnOX and CeO2
Co-precipitation
Impregnation
o-DCB
NH3-SCR
topic MnOX and CeO2
Co-precipitation
Impregnation
o-DCB
NH3-SCR
description [EN] Two series of catalysts based on Mn and Ce oxides were prepared by co-precipitation and impregnation, in order to study their physicochemical properties and catalytic performance in the simultaneous reduction of NO and oxidation of o-DCB. Co-precipitation catalysts showed better activity than those prepared by impregnation because of the formation of a MnOX-CeO2 solid solution, which improves redox and acid properties. Moreover, the catalysts with MnOX content between 80 and 90 mol.%, in which a coexistence between solid solution phase and Mn2O3 crystal was found, presented NO conversion above 90 % at temperatures below 250 °C and o-DCB conversion above 80 % at temperatures above 200 °C. The main by-products of SCR were N2O, produced in the whole range of temperature, and NO2, formed at temperatures above 300 °C. Selectivity to CO2 above 80 % was obtained using co-precipitation catalysts in all temperature range. Deactivation experiments showed that oxidation reaction strongly contributes to deactivate impregnation catalysts, whereas the effect of deactivation is lower in co-precipitation catalysts at high Mn contents.
publishDate 2020
dc.date.none.fl_str_mv 2020
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10810/71703
url http://hdl.handle.net/10810/71703
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.1016/j.mcat.2020.111152
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
© 2020 Elsevier under CC BY-NC-ND license
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/4.0/
© 2020 Elsevier under CC BY-NC-ND license
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Addi. Archivo Digital para la Docencia y la Investigación
instname:Universidad del País Vasco
instname_str Universidad del País Vasco
reponame_str Addi. Archivo Digital para la Docencia y la Investigación
collection Addi. Archivo Digital para la Docencia y la Investigación
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869407833582206976
score 15,81155

Similares en LA Referencia