Performance in a fluidized bed reactor of photocatalysts immobilized onto inert supports

Autores
Pozzo, Roberto Luis; Giombi, Jose Luis; Baltanas, Miguel Angel; Cassano, Alberto Enrique
Año de publicación
2000
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The performance of amodel photocatalyst (Degussa P25), immobilized onto quartz sand using a dry/wet physical deposition method has been studied in a fluidized-bed reactor. A simple model substrate, dilute oxalic acid, was mineralized at room temperature. For comparison purposes, a slurry of the powdery P25 was also used.The reactor apparent captured power (PC) and the apparent quantum efficiency .VR / were taken as the main performance criteria of both the free and the immobilized titania. The following variables were investigated: (a) degree of catalyst coverage on the support, (b) aggregation state of the catalyst particles, (c) texture of the supporting surface.Using increasing amounts of P25 deposited onto the support, the apparent captured power only grew moderately. Yet, the VR of the slurried P25 could not be matched even for conditions in which the amount of photocatalyst inside the photoreactor was eight times higher. Under those conditions the VR of the fluidized bed was 41% of that of the slurry, but the specific quantum efficiency was merely a 6% of that achievable with the free catalyst.With the employed deposition method a high degree of surface roughness of the support, and usage of thoroughly deionized water during the wetting step, are needed to prevent the coalescence of the titania during the immobilization. Otherwise, the catalytic performance becomes negligible.
Fil: Pozzo, Roberto Luis. 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: Giombi, Jose Luis. 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: Baltanas, Miguel Angel. 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: 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
Materia
Immobilized Photocatalysts;
Fluidized Beds;
Photocatalyst Performance;
Support Treatment & Deposition
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:11336/27667
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/27667
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Performance in a fluidized bed reactor of photocatalysts immobilized onto inert supportsPozzo, Roberto LuisGiombi, Jose LuisBaltanas, Miguel AngelCassano, Alberto EnriqueImmobilized Photocatalysts;Fluidized Beds;Photocatalyst Performance;Support Treatment & Depositionhttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2The performance of amodel photocatalyst (Degussa P25), immobilized onto quartz sand using a dry/wet physical deposition method has been studied in a fluidized-bed reactor. A simple model substrate, dilute oxalic acid, was mineralized at room temperature. For comparison purposes, a slurry of the powdery P25 was also used.The reactor apparent captured power (PC) and the apparent quantum efficiency .VR / were taken as the main performance criteria of both the free and the immobilized titania. The following variables were investigated: (a) degree of catalyst coverage on the support, (b) aggregation state of the catalyst particles, (c) texture of the supporting surface.Using increasing amounts of P25 deposited onto the support, the apparent captured power only grew moderately. Yet, the VR of the slurried P25 could not be matched even for conditions in which the amount of photocatalyst inside the photoreactor was eight times higher. Under those conditions the VR of the fluidized bed was 41% of that of the slurry, but the specific quantum efficiency was merely a 6% of that achievable with the free catalyst.With the employed deposition method a high degree of surface roughness of the support, and usage of thoroughly deionized water during the wetting step, are needed to prevent the coalescence of the titania during the immobilization. Otherwise, the catalytic performance becomes negligible.Fil: Pozzo, Roberto Luis. 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: Giombi, Jose Luis. 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: Baltanas, Miguel Angel. 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: 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; ArgentinaElsevier Science2000-05info: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/11336/27667Pozzo, Roberto Luis; Giombi, Jose Luis; Baltanas, Miguel Angel; Cassano, Alberto Enrique; Performance in a fluidized bed reactor of photocatalysts immobilized onto inert supports; Elsevier Science; Catalysis Today; 62; 2-3; 5-2000; 175-1870920-5861CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/S0920-5861(00)00419-3info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0920586100004193info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:54:54Zoai:ri.conicet.gov.ar:11336/27667instacron: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:34982025-10-15 14:54:55.247CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Performance in a fluidized bed reactor of photocatalysts immobilized onto inert supports
title Performance in a fluidized bed reactor of photocatalysts immobilized onto inert supports
spellingShingle Performance in a fluidized bed reactor of photocatalysts immobilized onto inert supports
Pozzo, Roberto Luis
Immobilized Photocatalysts;
Fluidized Beds;
Photocatalyst Performance;
Support Treatment & Deposition
title_short Performance in a fluidized bed reactor of photocatalysts immobilized onto inert supports
title_full Performance in a fluidized bed reactor of photocatalysts immobilized onto inert supports
title_fullStr Performance in a fluidized bed reactor of photocatalysts immobilized onto inert supports
title_full_unstemmed Performance in a fluidized bed reactor of photocatalysts immobilized onto inert supports
title_sort Performance in a fluidized bed reactor of photocatalysts immobilized onto inert supports
dc.creator.none.fl_str_mv Pozzo, Roberto Luis
Giombi, Jose Luis
Baltanas, Miguel Angel
Cassano, Alberto Enrique
author Pozzo, Roberto Luis
author_facet Pozzo, Roberto Luis
Giombi, Jose Luis
Baltanas, Miguel Angel
Cassano, Alberto Enrique
author_role author
author2 Giombi, Jose Luis
Baltanas, Miguel Angel
Cassano, Alberto Enrique
author2_role author
author
author
dc.subject.none.fl_str_mv Immobilized Photocatalysts;
Fluidized Beds;
Photocatalyst Performance;
Support Treatment & Deposition
topic Immobilized Photocatalysts;
Fluidized Beds;
Photocatalyst Performance;
Support Treatment & Deposition
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv The performance of amodel photocatalyst (Degussa P25), immobilized onto quartz sand using a dry/wet physical deposition method has been studied in a fluidized-bed reactor. A simple model substrate, dilute oxalic acid, was mineralized at room temperature. For comparison purposes, a slurry of the powdery P25 was also used.The reactor apparent captured power (PC) and the apparent quantum efficiency .VR / were taken as the main performance criteria of both the free and the immobilized titania. The following variables were investigated: (a) degree of catalyst coverage on the support, (b) aggregation state of the catalyst particles, (c) texture of the supporting surface.Using increasing amounts of P25 deposited onto the support, the apparent captured power only grew moderately. Yet, the VR of the slurried P25 could not be matched even for conditions in which the amount of photocatalyst inside the photoreactor was eight times higher. Under those conditions the VR of the fluidized bed was 41% of that of the slurry, but the specific quantum efficiency was merely a 6% of that achievable with the free catalyst.With the employed deposition method a high degree of surface roughness of the support, and usage of thoroughly deionized water during the wetting step, are needed to prevent the coalescence of the titania during the immobilization. Otherwise, the catalytic performance becomes negligible.
Fil: Pozzo, Roberto Luis. 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: Giombi, Jose Luis. 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: Baltanas, Miguel Angel. 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: 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
description The performance of amodel photocatalyst (Degussa P25), immobilized onto quartz sand using a dry/wet physical deposition method has been studied in a fluidized-bed reactor. A simple model substrate, dilute oxalic acid, was mineralized at room temperature. For comparison purposes, a slurry of the powdery P25 was also used.The reactor apparent captured power (PC) and the apparent quantum efficiency .VR / were taken as the main performance criteria of both the free and the immobilized titania. The following variables were investigated: (a) degree of catalyst coverage on the support, (b) aggregation state of the catalyst particles, (c) texture of the supporting surface.Using increasing amounts of P25 deposited onto the support, the apparent captured power only grew moderately. Yet, the VR of the slurried P25 could not be matched even for conditions in which the amount of photocatalyst inside the photoreactor was eight times higher. Under those conditions the VR of the fluidized bed was 41% of that of the slurry, but the specific quantum efficiency was merely a 6% of that achievable with the free catalyst.With the employed deposition method a high degree of surface roughness of the support, and usage of thoroughly deionized water during the wetting step, are needed to prevent the coalescence of the titania during the immobilization. Otherwise, the catalytic performance becomes negligible.
publishDate 2000
dc.date.none.fl_str_mv 2000-05
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/11336/27667
Pozzo, Roberto Luis; Giombi, Jose Luis; Baltanas, Miguel Angel; Cassano, Alberto Enrique; Performance in a fluidized bed reactor of photocatalysts immobilized onto inert supports; Elsevier Science; Catalysis Today; 62; 2-3; 5-2000; 175-187
0920-5861
CONICET Digital
CONICET
url http://hdl.handle.net/11336/27667
identifier_str_mv Pozzo, Roberto Luis; Giombi, Jose Luis; Baltanas, Miguel Angel; Cassano, Alberto Enrique; Performance in a fluidized bed reactor of photocatalysts immobilized onto inert supports; Elsevier Science; Catalysis Today; 62; 2-3; 5-2000; 175-187
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/S0920-5861(00)00419-3
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0920586100004193
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
_version_ 1846083082416816128
score 13.22299

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