Comparative Study of the Efficiency of Different Noble Metals Supported on Hydroxyapatite in the Catalytic Lean Methane Oxidation under Realistic Conditions

The combustion of lean methane was studied over palladium, rhodium, platinum, and ruthenium catalysts supported on hydroxyapatite (HAP). The samples were prepared by wetness impregnation and thoroughly characterized by BET, XRD, UV-Vis-NIR spectroscopy, H2-TPR, OSC, CO chemisorption, and TEM techniq...

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Autores: Boukha, Zouhair, De Rivas Martín, Beatriz, González Velasco, Juan Ramón, Gutiérrez Ortiz, José Ignacio, López Fonseca, Rubén
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:10810/52462
Acceso en línea:http://hdl.handle.net/10810/52462
Access Level:acceso abierto
Palabra clave:noble metals
hydroxyapatite
lean methane oxidation
OSC
water and CO2 effects
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spelling Comparative Study of the Efficiency of Different Noble Metals Supported on Hydroxyapatite in the Catalytic Lean Methane Oxidation under Realistic ConditionsBoukha, ZouhairDe Rivas Martín, BeatrizGonzález Velasco, Juan RamónGutiérrez Ortiz, José IgnacioLópez Fonseca, Rubénnoble metalshydroxyapatitelean methane oxidationOSCwater and CO2 effectsThe combustion of lean methane was studied over palladium, rhodium, platinum, and ruthenium catalysts supported on hydroxyapatite (HAP). The samples were prepared by wetness impregnation and thoroughly characterized by BET, XRD, UV-Vis-NIR spectroscopy, H2-TPR, OSC, CO chemisorption, and TEM techniques. It was found that the Pd/HAP and Rh/HAP catalysts exhibited a higher activity compared with Pt/HAP and Ru/HAP samples. Thus, the degree of oxidation of the supported metal under the reaction mixture notably influenced its catalytic performance. Although Pd and Rh catalysts could be easily re-oxidized, the re-oxidation of Pt and Ru samples appeared to be a slow process, resulting in small amounts of metal oxide active sites. Feeding water and CO2 was found to have a negative effect, which was more pronounced in the presence of water, on the activity of Pd and Rh catalysts. However, the inhibiting effect of CO2 and H2O decreased by increasing the reaction temperature.This research was funded by Ministerio de Economía y Competitividad (CTQ2015-73219-JIN (AEI/FEDER/UE)), Spanish ministry of Science and Innovation (PID2019-107105RB-I00 AEI/FEDER, UE) and Basque Government (GIC IT-1297-19).MDPI2021202120212021info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10810/52462reponame:Addi. Archivo Digital para la Docencia y la Investigacióninstname:Universidad del País VascoInglésinfo:eu-repo/grantAgreement/MINECO/CTQ2015-73219-JIN/info:eu-repo/grantAgreement/MICINN/PID2019-107105RB-I00/https://www.mdpi.com/1996-1944/14/13/3612info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/3.0/es/© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).oai:addi.ehu.eus:10810/524622026-06-18T09:23:17Z
dc.title.none.fl_str_mv Comparative Study of the Efficiency of Different Noble Metals Supported on Hydroxyapatite in the Catalytic Lean Methane Oxidation under Realistic Conditions
title Comparative Study of the Efficiency of Different Noble Metals Supported on Hydroxyapatite in the Catalytic Lean Methane Oxidation under Realistic Conditions
spellingShingle Comparative Study of the Efficiency of Different Noble Metals Supported on Hydroxyapatite in the Catalytic Lean Methane Oxidation under Realistic Conditions
Boukha, Zouhair
noble metals
hydroxyapatite
lean methane oxidation
OSC
water and CO2 effects
title_short Comparative Study of the Efficiency of Different Noble Metals Supported on Hydroxyapatite in the Catalytic Lean Methane Oxidation under Realistic Conditions
title_full Comparative Study of the Efficiency of Different Noble Metals Supported on Hydroxyapatite in the Catalytic Lean Methane Oxidation under Realistic Conditions
title_fullStr Comparative Study of the Efficiency of Different Noble Metals Supported on Hydroxyapatite in the Catalytic Lean Methane Oxidation under Realistic Conditions
title_full_unstemmed Comparative Study of the Efficiency of Different Noble Metals Supported on Hydroxyapatite in the Catalytic Lean Methane Oxidation under Realistic Conditions
title_sort Comparative Study of the Efficiency of Different Noble Metals Supported on Hydroxyapatite in the Catalytic Lean Methane Oxidation under Realistic Conditions
dc.creator.none.fl_str_mv Boukha, Zouhair
De Rivas Martín, Beatriz
González Velasco, Juan Ramón
Gutiérrez Ortiz, José Ignacio
López Fonseca, Rubén
author Boukha, Zouhair
author_facet Boukha, Zouhair
De Rivas Martín, Beatriz
González Velasco, Juan Ramón
Gutiérrez Ortiz, José Ignacio
López Fonseca, Rubén
author_role author
author2 De Rivas Martín, Beatriz
González Velasco, Juan Ramón
Gutiérrez Ortiz, José Ignacio
López Fonseca, Rubén
author2_role author
author
author
author
dc.subject.none.fl_str_mv noble metals
hydroxyapatite
lean methane oxidation
OSC
water and CO2 effects
topic noble metals
hydroxyapatite
lean methane oxidation
OSC
water and CO2 effects
description The combustion of lean methane was studied over palladium, rhodium, platinum, and ruthenium catalysts supported on hydroxyapatite (HAP). The samples were prepared by wetness impregnation and thoroughly characterized by BET, XRD, UV-Vis-NIR spectroscopy, H2-TPR, OSC, CO chemisorption, and TEM techniques. It was found that the Pd/HAP and Rh/HAP catalysts exhibited a higher activity compared with Pt/HAP and Ru/HAP samples. Thus, the degree of oxidation of the supported metal under the reaction mixture notably influenced its catalytic performance. Although Pd and Rh catalysts could be easily re-oxidized, the re-oxidation of Pt and Ru samples appeared to be a slow process, resulting in small amounts of metal oxide active sites. Feeding water and CO2 was found to have a negative effect, which was more pronounced in the presence of water, on the activity of Pd and Rh catalysts. However, the inhibiting effect of CO2 and H2O decreased by increasing the reaction temperature.
publishDate 2021
dc.date.none.fl_str_mv 2021
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/10810/52462
url http://hdl.handle.net/10810/52462
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/MINECO/CTQ2015-73219-JIN/
info:eu-repo/grantAgreement/MICINN/PID2019-107105RB-I00/
https://www.mdpi.com/1996-1944/14/13/3612
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/3.0/es/
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/3.0/es/
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
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
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