Surface properties and catalytic behavior of Ru supported on composite La2O3-SiO2 oxides

Autores
Faroldi, Betina María Cecilia; Lombardo, Eduardo Agustin; Cornaglia, Laura Maria
Año de publicación
2009
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Binary La2O3-SiO2 supports were employed to obtain active, stable Ru catalysts with high dispersions for the dry reforming of methane. Supports with 15, 27, 40 and 50 wt. % of La2O3 were prepared by incipient wetness impregnation on SiO2. The Ru loading was 0.6 wt % for all catalysts. The solids were evaluated in a fixed-bed reactor under differential conditions. Previously, they were reduced at either 673 K or 823 K. The most active catalyst was Ru/La2O3(50)-SiO2. All the uncalcined formulations were stable after 100 hours on stream.
XRD, CO chemisorption, TPR, XPS, ISS and CO adsorption monitored by FTIR were employed to characterize the catalysts and the Ru species. XRD showed the presence of La2Si2O7 with low crystallinity in all the supports. By means of XPS and ISS, the formation of a surface La2Si2O7 phase was suggested for samples containing La2O3 up to 40 wt. %. Higher contents could lead to surface La2O3 particle growth.
The TOFCH4 values showed a minimum for the Ru/La2O3(40)-SiO2 solid in agreement with a lower metal-support interaction. The Ru/La2O3(50)-SiO2 catalyst exhibited the highest TOFCH4 for both reduction treatments. The differences in thermal stability of the CO adsorbed species on Ru supported on silica or on binary La2O3-SiO2 supports sustain that the presence of lanthanum influences the metal support-interaction and metal dispersion.
Fil: Faroldi, Betina María Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Lombardo, Eduardo Agustin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Cornaglia, Laura Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Materia
Binary Supports
Ru
Hydrogen Production
Xps
Iss
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/60504
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Surface properties and catalytic behavior of Ru supported on composite La2O3-SiO2 oxidesFaroldi, Betina María CeciliaLombardo, Eduardo AgustinCornaglia, Laura MariaBinary SupportsRuHydrogen ProductionXpsIsshttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2Binary La2O3-SiO2 supports were employed to obtain active, stable Ru catalysts with high dispersions for the dry reforming of methane. Supports with 15, 27, 40 and 50 wt. % of La2O3 were prepared by incipient wetness impregnation on SiO2. The Ru loading was 0.6 wt % for all catalysts. The solids were evaluated in a fixed-bed reactor under differential conditions. Previously, they were reduced at either 673 K or 823 K. The most active catalyst was Ru/La2O3(50)-SiO2. All the uncalcined formulations were stable after 100 hours on stream.<br />XRD, CO chemisorption, TPR, XPS, ISS and CO adsorption monitored by FTIR were employed to characterize the catalysts and the Ru species. XRD showed the presence of La2Si2O7 with low crystallinity in all the supports. By means of XPS and ISS, the formation of a surface La2Si2O7 phase was suggested for samples containing La2O3 up to 40 wt. %. Higher contents could lead to surface La2O3 particle growth.<br />The TOFCH4 values showed a minimum for the Ru/La2O3(40)-SiO2 solid in agreement with a lower metal-support interaction. The Ru/La2O3(50)-SiO2 catalyst exhibited the highest TOFCH4 for both reduction treatments. The differences in thermal stability of the CO adsorbed species on Ru supported on silica or on binary La2O3-SiO2 supports sustain that the presence of lanthanum influences the metal support-interaction and metal dispersion.Fil: Faroldi, Betina María Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; ArgentinaFil: Lombardo, Eduardo Agustin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; ArgentinaFil: Cornaglia, Laura Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; ArgentinaElsevier Science2009-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/60504Faroldi, Betina María Cecilia; Lombardo, Eduardo Agustin; Cornaglia, Laura Maria; Surface properties and catalytic behavior of Ru supported on composite La2O3-SiO2 oxides; Elsevier Science; Applied Catalysis A: General; 369; 1-2; 11-2009; 15-260926-860XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://dx.doi.org/10.1016/j.apcata.2009.08.024info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:59:30Zoai:ri.conicet.gov.ar:11336/60504instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:59:31.001CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Surface properties and catalytic behavior of Ru supported on composite La2O3-SiO2 oxides
title Surface properties and catalytic behavior of Ru supported on composite La2O3-SiO2 oxides
spellingShingle Surface properties and catalytic behavior of Ru supported on composite La2O3-SiO2 oxides
Faroldi, Betina María Cecilia
Binary Supports
Ru
Hydrogen Production
Xps
Iss
title_short Surface properties and catalytic behavior of Ru supported on composite La2O3-SiO2 oxides
title_full Surface properties and catalytic behavior of Ru supported on composite La2O3-SiO2 oxides
title_fullStr Surface properties and catalytic behavior of Ru supported on composite La2O3-SiO2 oxides
title_full_unstemmed Surface properties and catalytic behavior of Ru supported on composite La2O3-SiO2 oxides
title_sort Surface properties and catalytic behavior of Ru supported on composite La2O3-SiO2 oxides
dc.creator.none.fl_str_mv Faroldi, Betina María Cecilia
Lombardo, Eduardo Agustin
Cornaglia, Laura Maria
author Faroldi, Betina María Cecilia
author_facet Faroldi, Betina María Cecilia
Lombardo, Eduardo Agustin
Cornaglia, Laura Maria
author_role author
author2 Lombardo, Eduardo Agustin
Cornaglia, Laura Maria
author2_role author
author
dc.subject.none.fl_str_mv Binary Supports
Ru
Hydrogen Production
Xps
Iss
topic Binary Supports
Ru
Hydrogen Production
Xps
Iss
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Binary La2O3-SiO2 supports were employed to obtain active, stable Ru catalysts with high dispersions for the dry reforming of methane. Supports with 15, 27, 40 and 50 wt. % of La2O3 were prepared by incipient wetness impregnation on SiO2. The Ru loading was 0.6 wt % for all catalysts. The solids were evaluated in a fixed-bed reactor under differential conditions. Previously, they were reduced at either 673 K or 823 K. The most active catalyst was Ru/La2O3(50)-SiO2. All the uncalcined formulations were stable after 100 hours on stream.<br />XRD, CO chemisorption, TPR, XPS, ISS and CO adsorption monitored by FTIR were employed to characterize the catalysts and the Ru species. XRD showed the presence of La2Si2O7 with low crystallinity in all the supports. By means of XPS and ISS, the formation of a surface La2Si2O7 phase was suggested for samples containing La2O3 up to 40 wt. %. Higher contents could lead to surface La2O3 particle growth.<br />The TOFCH4 values showed a minimum for the Ru/La2O3(40)-SiO2 solid in agreement with a lower metal-support interaction. The Ru/La2O3(50)-SiO2 catalyst exhibited the highest TOFCH4 for both reduction treatments. The differences in thermal stability of the CO adsorbed species on Ru supported on silica or on binary La2O3-SiO2 supports sustain that the presence of lanthanum influences the metal support-interaction and metal dispersion.
Fil: Faroldi, Betina María Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Lombardo, Eduardo Agustin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Cornaglia, Laura Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
description Binary La2O3-SiO2 supports were employed to obtain active, stable Ru catalysts with high dispersions for the dry reforming of methane. Supports with 15, 27, 40 and 50 wt. % of La2O3 were prepared by incipient wetness impregnation on SiO2. The Ru loading was 0.6 wt % for all catalysts. The solids were evaluated in a fixed-bed reactor under differential conditions. Previously, they were reduced at either 673 K or 823 K. The most active catalyst was Ru/La2O3(50)-SiO2. All the uncalcined formulations were stable after 100 hours on stream.<br />XRD, CO chemisorption, TPR, XPS, ISS and CO adsorption monitored by FTIR were employed to characterize the catalysts and the Ru species. XRD showed the presence of La2Si2O7 with low crystallinity in all the supports. By means of XPS and ISS, the formation of a surface La2Si2O7 phase was suggested for samples containing La2O3 up to 40 wt. %. Higher contents could lead to surface La2O3 particle growth.<br />The TOFCH4 values showed a minimum for the Ru/La2O3(40)-SiO2 solid in agreement with a lower metal-support interaction. The Ru/La2O3(50)-SiO2 catalyst exhibited the highest TOFCH4 for both reduction treatments. The differences in thermal stability of the CO adsorbed species on Ru supported on silica or on binary La2O3-SiO2 supports sustain that the presence of lanthanum influences the metal support-interaction and metal dispersion.
publishDate 2009
dc.date.none.fl_str_mv 2009-11
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/60504
Faroldi, Betina María Cecilia; Lombardo, Eduardo Agustin; Cornaglia, Laura Maria; Surface properties and catalytic behavior of Ru supported on composite La2O3-SiO2 oxides; Elsevier Science; Applied Catalysis A: General; 369; 1-2; 11-2009; 15-26
0926-860X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/60504
identifier_str_mv Faroldi, Betina María Cecilia; Lombardo, Eduardo Agustin; Cornaglia, Laura Maria; Surface properties and catalytic behavior of Ru supported on composite La2O3-SiO2 oxides; Elsevier Science; Applied Catalysis A: General; 369; 1-2; 11-2009; 15-26
0926-860X
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://dx.doi.org/10.1016/j.apcata.2009.08.024
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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