Bimodal effect of water on V2O5/TiO2 catalysts with different vanadium species in the simultaneous NO reduction and 1,2-dichlorobenzene oxidation

VOX/TiO2 catalysts with different vanadium loading were prepared in order to study the influence of vanadium species on the effect of water in the simultaneous NO reduction through NH3-SCR and o-DCB oxidation reactions. The presence of isolated, polymeric and crystalline species and their redox and...

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Autores: Martín Martín, Juan Alberto, Gallastegui Villa, Miren, González Marcos, María Pilar, Aranzabal Maiztegi, Asier, González Velasco, Juan Ramón
Tipo de recurso: artículo
Fecha de publicación:2021
País:España
Institución:Universidad del País Vasco
Repositorio:Addi. Archivo Digital para la Docencia y la Investigación
OAI Identifier:oai:addi.ehu.eus:10810/53735
Acceso en línea:http://hdl.handle.net/10810/53735
Access Level:acceso abierto
Palabra clave:water effect
VOX/TiO2
NH3-SCR
1,2-dichlorobenzene
vanadium species
deactivation
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spelling Bimodal effect of water on V2O5/TiO2 catalysts with different vanadium species in the simultaneous NO reduction and 1,2-dichlorobenzene oxidationMartín Martín, Juan AlbertoGallastegui Villa, MirenGonzález Marcos, María PilarAranzabal Maiztegi, AsierGonzález Velasco, Juan Ramónwater effectVOX/TiO2NH3-SCR1,2-dichlorobenzenevanadium speciesdeactivationVOX/TiO2 catalysts with different vanadium loading were prepared in order to study the influence of vanadium species on the effect of water in the simultaneous NO reduction through NH3-SCR and o-DCB oxidation reactions. The presence of isolated, polymeric and crystalline species and their redox and acid properties were evaluated by N2-Adsorption, XRD, Raman, H2-TPR, XPS and NH3-TPD. Water has a bimodal and reversible effect in both NO reduction and o-DCB oxidation depending on vanadium species and temperature. In SCR, water has a detrimental effect at low temperature due to competitive adsorption with NO and NH3, while at high temperature it promotes an increase of NO conversion associated to the suppression of side-reactions, which increase the selectivity towards N2. In o-DCB oxidation, the effect of water is the sum of two contributions: one positive, related to the removal of surface adsorbed detrimental species; and one negative, associated to the competitive adsorption with o-DCB. Thus, at high temperature water acts as inhibitor, while at low temperature water has a promotional effect in the highly dispersed vanadium catalysts due to their tendency to suffer deactivation, mainly by carbonaceous materials. The presence of water also favors total oxidation and decreases the formation of chlorinated by products.MINECO/FEDER (CTQ2015-64616-P), MINECO/FEDER (BES-2016-077849), IT657-13, IT1297- 19, INF12/37, UFI 11/39, PID2019-107503RB-I00, MCIN/AEI/10.13039/501100011033Elsevier202120212021info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10810/53735reponame:Addi. Archivo Digital para la Docencia y la Investigacióninstname:Universidad del País VascoInglésinfo:eu-repo/grantAgreement/MINECO/CTQ2015-64616-P/info:eu-repo/grantAgreement/MINECO/BES-2016-077849/info:eu-repo/grantAgreement/MINECO/PID2019-107503RB-I00/info:eu-repo/grantAgreement/MINECO/MCIN/AEIhttps://www.sciencedirect.com/science/article/pii/S1385894721006069https://www.sciencedirect.com/science/article/pii/S1385894721006069/pdfft?md5=48438e87007f151bd24c9b09b866f3ac&pid=1-s2.0-S1385894721006069-main.pdfinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/3.0/es/© 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND licenseoai:addi.ehu.eus:10810/537352026-06-18T09:23:17Z
dc.title.none.fl_str_mv Bimodal effect of water on V2O5/TiO2 catalysts with different vanadium species in the simultaneous NO reduction and 1,2-dichlorobenzene oxidation
title Bimodal effect of water on V2O5/TiO2 catalysts with different vanadium species in the simultaneous NO reduction and 1,2-dichlorobenzene oxidation
spellingShingle Bimodal effect of water on V2O5/TiO2 catalysts with different vanadium species in the simultaneous NO reduction and 1,2-dichlorobenzene oxidation
Martín Martín, Juan Alberto
water effect
VOX/TiO2
NH3-SCR
1,2-dichlorobenzene
vanadium species
deactivation
title_short Bimodal effect of water on V2O5/TiO2 catalysts with different vanadium species in the simultaneous NO reduction and 1,2-dichlorobenzene oxidation
title_full Bimodal effect of water on V2O5/TiO2 catalysts with different vanadium species in the simultaneous NO reduction and 1,2-dichlorobenzene oxidation
title_fullStr Bimodal effect of water on V2O5/TiO2 catalysts with different vanadium species in the simultaneous NO reduction and 1,2-dichlorobenzene oxidation
title_full_unstemmed Bimodal effect of water on V2O5/TiO2 catalysts with different vanadium species in the simultaneous NO reduction and 1,2-dichlorobenzene oxidation
title_sort Bimodal effect of water on V2O5/TiO2 catalysts with different vanadium species in the simultaneous NO reduction and 1,2-dichlorobenzene oxidation
dc.creator.none.fl_str_mv Martín Martín, Juan Alberto
Gallastegui Villa, Miren
González Marcos, María Pilar
Aranzabal Maiztegi, Asier
González Velasco, Juan Ramón
author Martín Martín, Juan Alberto
author_facet Martín Martín, Juan Alberto
Gallastegui Villa, Miren
González Marcos, María Pilar
Aranzabal Maiztegi, Asier
González Velasco, Juan Ramón
author_role author
author2 Gallastegui Villa, Miren
González Marcos, María Pilar
Aranzabal Maiztegi, Asier
González Velasco, Juan Ramón
author2_role author
author
author
author
dc.subject.none.fl_str_mv water effect
VOX/TiO2
NH3-SCR
1,2-dichlorobenzene
vanadium species
deactivation
topic water effect
VOX/TiO2
NH3-SCR
1,2-dichlorobenzene
vanadium species
deactivation
description VOX/TiO2 catalysts with different vanadium loading were prepared in order to study the influence of vanadium species on the effect of water in the simultaneous NO reduction through NH3-SCR and o-DCB oxidation reactions. The presence of isolated, polymeric and crystalline species and their redox and acid properties were evaluated by N2-Adsorption, XRD, Raman, H2-TPR, XPS and NH3-TPD. Water has a bimodal and reversible effect in both NO reduction and o-DCB oxidation depending on vanadium species and temperature. In SCR, water has a detrimental effect at low temperature due to competitive adsorption with NO and NH3, while at high temperature it promotes an increase of NO conversion associated to the suppression of side-reactions, which increase the selectivity towards N2. In o-DCB oxidation, the effect of water is the sum of two contributions: one positive, related to the removal of surface adsorbed detrimental species; and one negative, associated to the competitive adsorption with o-DCB. Thus, at high temperature water acts as inhibitor, while at low temperature water has a promotional effect in the highly dispersed vanadium catalysts due to their tendency to suffer deactivation, mainly by carbonaceous materials. The presence of water also favors total oxidation and decreases the formation of chlorinated by products.
publishDate 2021
dc.date.none.fl_str_mv 2021
2021
2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10810/53735
url http://hdl.handle.net/10810/53735
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/MINECO/CTQ2015-64616-P/
info:eu-repo/grantAgreement/MINECO/BES-2016-077849/
info:eu-repo/grantAgreement/MINECO/PID2019-107503RB-I00/
info:eu-repo/grantAgreement/MINECO/MCIN/AEI
https://www.sciencedirect.com/science/article/pii/S1385894721006069
https://www.sciencedirect.com/science/article/pii/S1385894721006069/pdfft?md5=48438e87007f151bd24c9b09b866f3ac&pid=1-s2.0-S1385894721006069-main.pdf
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/3.0/es/
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
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score 15,301603

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