Heteropolyacids with Keggin structure supported on silica-alumina

Autores
Vazquez, Patricia Graciela; Quaranta, Nancy Esther
Año de publicación
2006
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The behaviour of molybdophosphoric acid, with Keggin structure, supported on different silica-alumina mixtures, obtained by sol-gel method, was studied. Different techniques were used to synthesise the supports. In one of them, commercial alumina was added to a tetraethyl orthosilicate (TEOS) solution, and then this was hydrolysed. In the other preparations, TEOS and aluminium tri-sec-butoxide were hydrolysed, simultaneously or with TEOS prehydrolysis. The catalysts were prepared by incipient wetness impregnation, and different thermal treatments were applied after their leaching with toluene. The specific surface area of the solids was measured, and the nature of the Keggin heteropolyacid species present in the catalysts was characterised by diffuse reflectance spectroscopy and X-ray diffraction. In addition, their acidic properties were evaluated by potentiometric titration with n-butylamine
Fil: Vazquez, Patricia Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; Argentina
Fil: Quaranta, Nancy Esther. Universidad Tecnológica Nacional. Facultad Regional San Nicolás. Centro para el Desarrollo Tecnológico de Materiales; Argentina
Materia
Keggin Heteropolyacids
Toluene
Molybdophosphoric Acid
Silica-Alumina
Sol-Gel Synthesis
Leaching
Thermal Treatments
Acidic Behaviour
Acidic Properties
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:11336/54603
Acceder
id CONICETDig_f92fb329a5d20663439de35a388a20d7
oai_identifier_str oai:ri.conicet.gov.ar:11336/54603
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Heteropolyacids with Keggin structure supported on silica-aluminaVazquez, Patricia GracielaQuaranta, Nancy EstherKeggin HeteropolyacidsTolueneMolybdophosphoric AcidSilica-AluminaSol-Gel SynthesisLeachingThermal TreatmentsAcidic BehaviourAcidic Propertieshttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2The behaviour of molybdophosphoric acid, with Keggin structure, supported on different silica-alumina mixtures, obtained by sol-gel method, was studied. Different techniques were used to synthesise the supports. In one of them, commercial alumina was added to a tetraethyl orthosilicate (TEOS) solution, and then this was hydrolysed. In the other preparations, TEOS and aluminium tri-sec-butoxide were hydrolysed, simultaneously or with TEOS prehydrolysis. The catalysts were prepared by incipient wetness impregnation, and different thermal treatments were applied after their leaching with toluene. The specific surface area of the solids was measured, and the nature of the Keggin heteropolyacid species present in the catalysts was characterised by diffuse reflectance spectroscopy and X-ray diffraction. In addition, their acidic properties were evaluated by potentiometric titration with n-butylamineFil: Vazquez, Patricia Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; ArgentinaFil: Quaranta, Nancy Esther. Universidad Tecnológica Nacional. Facultad Regional San Nicolás. Centro para el Desarrollo Tecnológico de Materiales; ArgentinaInderscience Enterprises2006-08-16info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/54603Vazquez, Patricia Graciela; Quaranta, Nancy Esther; Heteropolyacids with Keggin structure supported on silica-alumina; Inderscience Enterprises; International Journal of Materials and Product Technology; 27; 1-2; 16-8-2006; 101-1090268-19001741-5209CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/ 10.1504/IJMPT.2006.010676info:eu-repo/semantics/altIdentifier/url/https://www.inderscienceonline.com/doi/pdf/10.1504/IJMPT.2006.010676info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:08:05Zoai:ri.conicet.gov.ar:11336/54603instacron: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 10:08:05.887CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Heteropolyacids with Keggin structure supported on silica-alumina
title Heteropolyacids with Keggin structure supported on silica-alumina
spellingShingle Heteropolyacids with Keggin structure supported on silica-alumina
Vazquez, Patricia Graciela
Keggin Heteropolyacids
Toluene
Molybdophosphoric Acid
Silica-Alumina
Sol-Gel Synthesis
Leaching
Thermal Treatments
Acidic Behaviour
Acidic Properties
title_short Heteropolyacids with Keggin structure supported on silica-alumina
title_full Heteropolyacids with Keggin structure supported on silica-alumina
title_fullStr Heteropolyacids with Keggin structure supported on silica-alumina
title_full_unstemmed Heteropolyacids with Keggin structure supported on silica-alumina
title_sort Heteropolyacids with Keggin structure supported on silica-alumina
dc.creator.none.fl_str_mv Vazquez, Patricia Graciela
Quaranta, Nancy Esther
author Vazquez, Patricia Graciela
author_facet Vazquez, Patricia Graciela
Quaranta, Nancy Esther
author_role author
author2 Quaranta, Nancy Esther
author2_role author
dc.subject.none.fl_str_mv Keggin Heteropolyacids
Toluene
Molybdophosphoric Acid
Silica-Alumina
Sol-Gel Synthesis
Leaching
Thermal Treatments
Acidic Behaviour
Acidic Properties
topic Keggin Heteropolyacids
Toluene
Molybdophosphoric Acid
Silica-Alumina
Sol-Gel Synthesis
Leaching
Thermal Treatments
Acidic Behaviour
Acidic Properties
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 behaviour of molybdophosphoric acid, with Keggin structure, supported on different silica-alumina mixtures, obtained by sol-gel method, was studied. Different techniques were used to synthesise the supports. In one of them, commercial alumina was added to a tetraethyl orthosilicate (TEOS) solution, and then this was hydrolysed. In the other preparations, TEOS and aluminium tri-sec-butoxide were hydrolysed, simultaneously or with TEOS prehydrolysis. The catalysts were prepared by incipient wetness impregnation, and different thermal treatments were applied after their leaching with toluene. The specific surface area of the solids was measured, and the nature of the Keggin heteropolyacid species present in the catalysts was characterised by diffuse reflectance spectroscopy and X-ray diffraction. In addition, their acidic properties were evaluated by potentiometric titration with n-butylamine
Fil: Vazquez, Patricia Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; Argentina
Fil: Quaranta, Nancy Esther. Universidad Tecnológica Nacional. Facultad Regional San Nicolás. Centro para el Desarrollo Tecnológico de Materiales; Argentina
description The behaviour of molybdophosphoric acid, with Keggin structure, supported on different silica-alumina mixtures, obtained by sol-gel method, was studied. Different techniques were used to synthesise the supports. In one of them, commercial alumina was added to a tetraethyl orthosilicate (TEOS) solution, and then this was hydrolysed. In the other preparations, TEOS and aluminium tri-sec-butoxide were hydrolysed, simultaneously or with TEOS prehydrolysis. The catalysts were prepared by incipient wetness impregnation, and different thermal treatments were applied after their leaching with toluene. The specific surface area of the solids was measured, and the nature of the Keggin heteropolyacid species present in the catalysts was characterised by diffuse reflectance spectroscopy and X-ray diffraction. In addition, their acidic properties were evaluated by potentiometric titration with n-butylamine
publishDate 2006
dc.date.none.fl_str_mv 2006-08-16
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/11336/54603
Vazquez, Patricia Graciela; Quaranta, Nancy Esther; Heteropolyacids with Keggin structure supported on silica-alumina; Inderscience Enterprises; International Journal of Materials and Product Technology; 27; 1-2; 16-8-2006; 101-109
0268-1900
1741-5209
CONICET Digital
CONICET
url http://hdl.handle.net/11336/54603
identifier_str_mv Vazquez, Patricia Graciela; Quaranta, Nancy Esther; Heteropolyacids with Keggin structure supported on silica-alumina; Inderscience Enterprises; International Journal of Materials and Product Technology; 27; 1-2; 16-8-2006; 101-109
0268-1900
1741-5209
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/ 10.1504/IJMPT.2006.010676
info:eu-repo/semantics/altIdentifier/url/https://www.inderscienceonline.com/doi/pdf/10.1504/IJMPT.2006.010676
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
dc.publisher.none.fl_str_mv Inderscience Enterprises
publisher.none.fl_str_mv Inderscience Enterprises
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_ 1844613947062222848
score 13.070432

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