MgO/NiAl2O4 as a new formulation of reforming catalysts: Tuning the surface properties for the enhanced partial oxidation of methane

Magnesia modified nickel aluminate spinel catalysts were synthesised and characterised by BET, TEM, XRD, H2-TPR, XPS, CO2-TPD and TGA-MS techniques. The addition of this promoter induced significant changes in the textural, structural and chemical properties of the resulting spinel derived catalysts...

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Autores: Boukha, Zouhair, Jiménez González, Cristina, Gil Calvo, Miryam, De Rivas Martín, Beatriz, González Velasco, Juan Ramón, Gutiérrez Ortiz, José Ignacio, López Fonseca, Rubén
Tipo de recurso: artículo
Fecha de publicación:2016
País:España
Institución:Universidad del País Vasco
Repositorio:Addi. Archivo Digital para la Docencia y la Investigación
OAI Identifier:oai:addi.ehu.eus:10810/71099
Acceso en línea:http://hdl.handle.net/10810/71099
Access Level:acceso abierto
Palabra clave:nickel aluminate
magnesium oxide
surface basicity
partial oxidation of methane
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spelling MgO/NiAl2O4 as a new formulation of reforming catalysts: Tuning the surface properties for the enhanced partial oxidation of methaneBoukha, ZouhairJiménez González, CristinaGil Calvo, MiryamDe Rivas Martín, BeatrizGonzález Velasco, Juan RamónGutiérrez Ortiz, José IgnacioLópez Fonseca, Rubénnickel aluminatemagnesium oxidesurface basicitypartial oxidation of methaneMagnesia modified nickel aluminate spinel catalysts were synthesised and characterised by BET, TEM, XRD, H2-TPR, XPS, CO2-TPD and TGA-MS techniques. The addition of this promoter induced significant changes in the textural, structural and chemical properties of the resulting spinel derived catalysts. Thus, it enhanced the resistance of the deposited Ni particles against sintering, whereas, upon increasing MgO loading, it drastically modified the density and the strength of the surface basic sites. In fact, an apparent weakening of the surface basic sites with the abundance of highly dispersed Mg species was interestingly observed. The changes provoked by MgO addition deeply influenced the catalytic performance of the prepared samples in the partial oxidation of methane reaction at 700 °C. In this sense, it was found a good correlation between the measured density of the strong basic sites on the different samples, including the bare NiAl2O4, and their catalytic activity. Hence, the MgO(5 wt.%)/NiAl2O4 sample, with a magnesium loading close to the theoretical monolayer and the lowest strong basic density sites, exhibited the best catalytic performance under both stoichiometric (O/C = 1) and non-stoichiometric (O/C = 0.75) conditions during a relatively prolonged time on stream.The authors wish to thank the financial support for this work provided by the Ministry of Economy and Competitiveness (ENE2013-41187-R), the Basque Government (PRE_2013_2_453, IT657-13) and the University of The Basque Country (UFI 11/39).Elsevier202520252016info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10810/71099reponame:Addi. Archivo Digital para la Docencia y la Investigacióninstname:Universidad del País VascoInglésinfo:eu-repo/grantAgreement/MINECO/ENE2013-41187-R)/https://doi.org/10.1016/j.apcatb.2016.06.045info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0/© 2016 Elsevier under CC BY-NC-ND licenseoai:addi.ehu.eus:10810/710992026-06-18T09:23:17Z
dc.title.none.fl_str_mv MgO/NiAl2O4 as a new formulation of reforming catalysts: Tuning the surface properties for the enhanced partial oxidation of methane
title MgO/NiAl2O4 as a new formulation of reforming catalysts: Tuning the surface properties for the enhanced partial oxidation of methane
spellingShingle MgO/NiAl2O4 as a new formulation of reforming catalysts: Tuning the surface properties for the enhanced partial oxidation of methane
Boukha, Zouhair
nickel aluminate
magnesium oxide
surface basicity
partial oxidation of methane
title_short MgO/NiAl2O4 as a new formulation of reforming catalysts: Tuning the surface properties for the enhanced partial oxidation of methane
title_full MgO/NiAl2O4 as a new formulation of reforming catalysts: Tuning the surface properties for the enhanced partial oxidation of methane
title_fullStr MgO/NiAl2O4 as a new formulation of reforming catalysts: Tuning the surface properties for the enhanced partial oxidation of methane
title_full_unstemmed MgO/NiAl2O4 as a new formulation of reforming catalysts: Tuning the surface properties for the enhanced partial oxidation of methane
title_sort MgO/NiAl2O4 as a new formulation of reforming catalysts: Tuning the surface properties for the enhanced partial oxidation of methane
dc.creator.none.fl_str_mv Boukha, Zouhair
Jiménez González, Cristina
Gil Calvo, Miryam
De Rivas Martín, Beatriz
González Velasco, Juan Ramón
Gutiérrez Ortiz, José Ignacio
López Fonseca, Rubén
author Boukha, Zouhair
author_facet Boukha, Zouhair
Jiménez González, Cristina
Gil Calvo, Miryam
De Rivas Martín, Beatriz
González Velasco, Juan Ramón
Gutiérrez Ortiz, José Ignacio
López Fonseca, Rubén
author_role author
author2 Jiménez González, Cristina
Gil Calvo, Miryam
De Rivas Martín, Beatriz
González Velasco, Juan Ramón
Gutiérrez Ortiz, José Ignacio
López Fonseca, Rubén
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv nickel aluminate
magnesium oxide
surface basicity
partial oxidation of methane
topic nickel aluminate
magnesium oxide
surface basicity
partial oxidation of methane
description Magnesia modified nickel aluminate spinel catalysts were synthesised and characterised by BET, TEM, XRD, H2-TPR, XPS, CO2-TPD and TGA-MS techniques. The addition of this promoter induced significant changes in the textural, structural and chemical properties of the resulting spinel derived catalysts. Thus, it enhanced the resistance of the deposited Ni particles against sintering, whereas, upon increasing MgO loading, it drastically modified the density and the strength of the surface basic sites. In fact, an apparent weakening of the surface basic sites with the abundance of highly dispersed Mg species was interestingly observed. The changes provoked by MgO addition deeply influenced the catalytic performance of the prepared samples in the partial oxidation of methane reaction at 700 °C. In this sense, it was found a good correlation between the measured density of the strong basic sites on the different samples, including the bare NiAl2O4, and their catalytic activity. Hence, the MgO(5 wt.%)/NiAl2O4 sample, with a magnesium loading close to the theoretical monolayer and the lowest strong basic density sites, exhibited the best catalytic performance under both stoichiometric (O/C = 1) and non-stoichiometric (O/C = 0.75) conditions during a relatively prolonged time on stream.
publishDate 2016
dc.date.none.fl_str_mv 2016
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/10810/71099
url http://hdl.handle.net/10810/71099
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/MINECO/ENE2013-41187-R)/
https://doi.org/10.1016/j.apcatb.2016.06.045
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
© 2016 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/
© 2016 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
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