Quantum Efficiency of Cyanide Photooxidation with TiO2/SiO2 Catalysts: Multivariate Analysis by Experimental Design

Autores
Marugan, Javier; Van Grieken, Rafael; Cassano, Alberto Enrique; Alfano, Orlando Mario
Año de publicación
2007
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Despite the large amount of work dealing with supported photocatalysts used to overcome the difficulties associated with the recovery of powdered titania after the photocatalytic treatments, few attempts have been made to calculate the quantum efficiency (h) of these materials. In this work the quantum efficiency for the photooxidation of cyanide with TiO2 and TiO2/SiO2 has been experimentally calculated using an approach based on the resolution of the radiative transfer equation inside the photoreactor. Due to the low absorption coefficient of the silica-supported material, a two-dimensional two-directional reactor model has been developed to describe the photon transport. The dependence of h on the incident radiation flux, the catalysts concentration and the cyanide concentration has been investigated. With both material suspensions, higher quantum efficiencies have been observed when lower radiation fluxes and higher cyanide concentrations are used. However, different trends in the quantum efficiencies are observed when increasing the catalyst concentration, leading to higher values when using powdered TiO2 and lower values for TiO2/SiO2 suspensions.
Fil: Marugan, Javier. Universidad Rey Juan Carlos; España
Fil: Van Grieken, Rafael. Universidad Rey Juan Carlos; España
Fil: Cassano, Alberto Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
Fil: Alfano, Orlando Mario. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
Materia
Quantum Efficiencies
Cyanide
Tio2/Sio2
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:11336/26038
Acceder
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spelling Quantum Efficiency of Cyanide Photooxidation with TiO2/SiO2 Catalysts: Multivariate Analysis by Experimental DesignMarugan, JavierVan Grieken, RafaelCassano, Alberto EnriqueAlfano, Orlando MarioQuantum EfficienciesCyanideTio2/Sio2https://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2Despite the large amount of work dealing with supported photocatalysts used to overcome the difficulties associated with the recovery of powdered titania after the photocatalytic treatments, few attempts have been made to calculate the quantum efficiency (h) of these materials. In this work the quantum efficiency for the photooxidation of cyanide with TiO2 and TiO2/SiO2 has been experimentally calculated using an approach based on the resolution of the radiative transfer equation inside the photoreactor. Due to the low absorption coefficient of the silica-supported material, a two-dimensional two-directional reactor model has been developed to describe the photon transport. The dependence of h on the incident radiation flux, the catalysts concentration and the cyanide concentration has been investigated. With both material suspensions, higher quantum efficiencies have been observed when lower radiation fluxes and higher cyanide concentrations are used. However, different trends in the quantum efficiencies are observed when increasing the catalyst concentration, leading to higher values when using powdered TiO2 and lower values for TiO2/SiO2 suspensions.Fil: Marugan, Javier. Universidad Rey Juan Carlos; EspañaFil: Van Grieken, Rafael. Universidad Rey Juan Carlos; EspañaFil: Cassano, Alberto Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; ArgentinaFil: Alfano, Orlando Mario. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; ArgentinaElsevier Science2007-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/26038Marugan, Javier; Van Grieken, Rafael; Cassano, Alberto Enrique; Alfano, Orlando Mario; Quantum Efficiency of Cyanide Photooxidation with TiO2/SiO2 Catalysts: Multivariate Analysis by Experimental Design; Elsevier Science; Catalysis Today; 129; 1-2; 12-2007; 143-1510920-5861CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.cattod.2007.06.060info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0920586107004208info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:45:11Zoai:ri.conicet.gov.ar:11336/26038instacron: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:34982025-09-03 09:45:12.163CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Quantum Efficiency of Cyanide Photooxidation with TiO2/SiO2 Catalysts: Multivariate Analysis by Experimental Design
title Quantum Efficiency of Cyanide Photooxidation with TiO2/SiO2 Catalysts: Multivariate Analysis by Experimental Design
spellingShingle Quantum Efficiency of Cyanide Photooxidation with TiO2/SiO2 Catalysts: Multivariate Analysis by Experimental Design
Marugan, Javier
Quantum Efficiencies
Cyanide
Tio2/Sio2
title_short Quantum Efficiency of Cyanide Photooxidation with TiO2/SiO2 Catalysts: Multivariate Analysis by Experimental Design
title_full Quantum Efficiency of Cyanide Photooxidation with TiO2/SiO2 Catalysts: Multivariate Analysis by Experimental Design
title_fullStr Quantum Efficiency of Cyanide Photooxidation with TiO2/SiO2 Catalysts: Multivariate Analysis by Experimental Design
title_full_unstemmed Quantum Efficiency of Cyanide Photooxidation with TiO2/SiO2 Catalysts: Multivariate Analysis by Experimental Design
title_sort Quantum Efficiency of Cyanide Photooxidation with TiO2/SiO2 Catalysts: Multivariate Analysis by Experimental Design
dc.creator.none.fl_str_mv Marugan, Javier
Van Grieken, Rafael
Cassano, Alberto Enrique
Alfano, Orlando Mario
author Marugan, Javier
author_facet Marugan, Javier
Van Grieken, Rafael
Cassano, Alberto Enrique
Alfano, Orlando Mario
author_role author
author2 Van Grieken, Rafael
Cassano, Alberto Enrique
Alfano, Orlando Mario
author2_role author
author
author
dc.subject.none.fl_str_mv Quantum Efficiencies
Cyanide
Tio2/Sio2
topic Quantum Efficiencies
Cyanide
Tio2/Sio2
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Despite the large amount of work dealing with supported photocatalysts used to overcome the difficulties associated with the recovery of powdered titania after the photocatalytic treatments, few attempts have been made to calculate the quantum efficiency (h) of these materials. In this work the quantum efficiency for the photooxidation of cyanide with TiO2 and TiO2/SiO2 has been experimentally calculated using an approach based on the resolution of the radiative transfer equation inside the photoreactor. Due to the low absorption coefficient of the silica-supported material, a two-dimensional two-directional reactor model has been developed to describe the photon transport. The dependence of h on the incident radiation flux, the catalysts concentration and the cyanide concentration has been investigated. With both material suspensions, higher quantum efficiencies have been observed when lower radiation fluxes and higher cyanide concentrations are used. However, different trends in the quantum efficiencies are observed when increasing the catalyst concentration, leading to higher values when using powdered TiO2 and lower values for TiO2/SiO2 suspensions.
Fil: Marugan, Javier. Universidad Rey Juan Carlos; España
Fil: Van Grieken, Rafael. Universidad Rey Juan Carlos; España
Fil: Cassano, Alberto Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
Fil: Alfano, Orlando Mario. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
description Despite the large amount of work dealing with supported photocatalysts used to overcome the difficulties associated with the recovery of powdered titania after the photocatalytic treatments, few attempts have been made to calculate the quantum efficiency (h) of these materials. In this work the quantum efficiency for the photooxidation of cyanide with TiO2 and TiO2/SiO2 has been experimentally calculated using an approach based on the resolution of the radiative transfer equation inside the photoreactor. Due to the low absorption coefficient of the silica-supported material, a two-dimensional two-directional reactor model has been developed to describe the photon transport. The dependence of h on the incident radiation flux, the catalysts concentration and the cyanide concentration has been investigated. With both material suspensions, higher quantum efficiencies have been observed when lower radiation fluxes and higher cyanide concentrations are used. However, different trends in the quantum efficiencies are observed when increasing the catalyst concentration, leading to higher values when using powdered TiO2 and lower values for TiO2/SiO2 suspensions.
publishDate 2007
dc.date.none.fl_str_mv 2007-12
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/11336/26038
Marugan, Javier; Van Grieken, Rafael; Cassano, Alberto Enrique; Alfano, Orlando Mario; Quantum Efficiency of Cyanide Photooxidation with TiO2/SiO2 Catalysts: Multivariate Analysis by Experimental Design; Elsevier Science; Catalysis Today; 129; 1-2; 12-2007; 143-151
0920-5861
CONICET Digital
CONICET
url http://hdl.handle.net/11336/26038
identifier_str_mv Marugan, Javier; Van Grieken, Rafael; Cassano, Alberto Enrique; Alfano, Orlando Mario; Quantum Efficiency of Cyanide Photooxidation with TiO2/SiO2 Catalysts: Multivariate Analysis by Experimental Design; Elsevier Science; Catalysis Today; 129; 1-2; 12-2007; 143-151
0920-5861
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.cattod.2007.06.060
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0920586107004208
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
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 13.13397

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