Characterization of silica supported chromium complexes

Autores
Parentis, Monica Liliana; Bonini, Norberto Alejandro; Gonzo, Elio Emilio
Año de publicación
2000
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Cr/SiO2 catalysts were prepared via the deposition of mononuclear and binuclear chromium (III) ammine complexes on silica. The influence of chromium loading and calcination temperatura upon the type of species formed was determined. FTIR and Raman studies revealed the presence of Cr(VI) species as monomers and dimers in calcined catalysts and the existence of a chemical interaction between the complex chromium ions and the support. Futhemore, IR of adsorbed pyridine showed the presence of Lewis centers just before calcination. After calcination Brönsted sites were developed, these sites were related to the presence of Cr(VI) species. The relative concentration of such centers depends on the ammount of chromium exchanged.
Fil: Parentis, Monica Liliana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones para la Industria Química. Universidad Nacional de Salta. Facultad de Ingeniería. Instituto de Investigaciones para la Industria Química; Argentina
Fil: Bonini, Norberto Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones para la Industria Química. Universidad Nacional de Salta. Facultad de Ingeniería. Instituto de Investigaciones para la Industria Química; Argentina
Fil: Gonzo, Elio Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones para la Industria Química. Universidad Nacional de Salta. Facultad de Ingeniería. Instituto de Investigaciones para la Industria Química; Argentina
Materia
Chromium Complexes
Chromium-Silica
Ion Exchange
Pyridine
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:11336/73079
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Characterization of silica supported chromium complexesParentis, Monica LilianaBonini, Norberto AlejandroGonzo, Elio EmilioChromium ComplexesChromium-SilicaIon ExchangePyridinehttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2The Cr/SiO2 catalysts were prepared via the deposition of mononuclear and binuclear chromium (III) ammine complexes on silica. The influence of chromium loading and calcination temperatura upon the type of species formed was determined. FTIR and Raman studies revealed the presence of Cr(VI) species as monomers and dimers in calcined catalysts and the existence of a chemical interaction between the complex chromium ions and the support. Futhemore, IR of adsorbed pyridine showed the presence of Lewis centers just before calcination. After calcination Brönsted sites were developed, these sites were related to the presence of Cr(VI) species. The relative concentration of such centers depends on the ammount of chromium exchanged.Fil: Parentis, Monica Liliana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones para la Industria Química. Universidad Nacional de Salta. Facultad de Ingeniería. Instituto de Investigaciones para la Industria Química; ArgentinaFil: Bonini, Norberto Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones para la Industria Química. Universidad Nacional de Salta. Facultad de Ingeniería. Instituto de Investigaciones para la Industria Química; ArgentinaFil: Gonzo, Elio Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones para la Industria Química. Universidad Nacional de Salta. Facultad de Ingeniería. Instituto de Investigaciones para la Industria Química; ArgentinaPlanta Piloto de Ingeniería Química2000-03info: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/11336/73079Parentis, Monica Liliana; Bonini, Norberto Alejandro; Gonzo, Elio Emilio; Characterization of silica supported chromium complexes; Planta Piloto de Ingeniería Química; Latin American Applied Research; 30; 1; 3-2000; 41-500327-07931851-8796CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.laar.uns.edu.ar/indexes/i30_1.htminfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:23:55Zoai:ri.conicet.gov.ar:11336/73079instacron: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 14:23:55.935CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Characterization of silica supported chromium complexes
title Characterization of silica supported chromium complexes
spellingShingle Characterization of silica supported chromium complexes
Parentis, Monica Liliana
Chromium Complexes
Chromium-Silica
Ion Exchange
Pyridine
title_short Characterization of silica supported chromium complexes
title_full Characterization of silica supported chromium complexes
title_fullStr Characterization of silica supported chromium complexes
title_full_unstemmed Characterization of silica supported chromium complexes
title_sort Characterization of silica supported chromium complexes
dc.creator.none.fl_str_mv Parentis, Monica Liliana
Bonini, Norberto Alejandro
Gonzo, Elio Emilio
author Parentis, Monica Liliana
author_facet Parentis, Monica Liliana
Bonini, Norberto Alejandro
Gonzo, Elio Emilio
author_role author
author2 Bonini, Norberto Alejandro
Gonzo, Elio Emilio
author2_role author
author
dc.subject.none.fl_str_mv Chromium Complexes
Chromium-Silica
Ion Exchange
Pyridine
topic Chromium Complexes
Chromium-Silica
Ion Exchange
Pyridine
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 Cr/SiO2 catalysts were prepared via the deposition of mononuclear and binuclear chromium (III) ammine complexes on silica. The influence of chromium loading and calcination temperatura upon the type of species formed was determined. FTIR and Raman studies revealed the presence of Cr(VI) species as monomers and dimers in calcined catalysts and the existence of a chemical interaction between the complex chromium ions and the support. Futhemore, IR of adsorbed pyridine showed the presence of Lewis centers just before calcination. After calcination Brönsted sites were developed, these sites were related to the presence of Cr(VI) species. The relative concentration of such centers depends on the ammount of chromium exchanged.
Fil: Parentis, Monica Liliana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones para la Industria Química. Universidad Nacional de Salta. Facultad de Ingeniería. Instituto de Investigaciones para la Industria Química; Argentina
Fil: Bonini, Norberto Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones para la Industria Química. Universidad Nacional de Salta. Facultad de Ingeniería. Instituto de Investigaciones para la Industria Química; Argentina
Fil: Gonzo, Elio Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones para la Industria Química. Universidad Nacional de Salta. Facultad de Ingeniería. Instituto de Investigaciones para la Industria Química; Argentina
description The Cr/SiO2 catalysts were prepared via the deposition of mononuclear and binuclear chromium (III) ammine complexes on silica. The influence of chromium loading and calcination temperatura upon the type of species formed was determined. FTIR and Raman studies revealed the presence of Cr(VI) species as monomers and dimers in calcined catalysts and the existence of a chemical interaction between the complex chromium ions and the support. Futhemore, IR of adsorbed pyridine showed the presence of Lewis centers just before calcination. After calcination Brönsted sites were developed, these sites were related to the presence of Cr(VI) species. The relative concentration of such centers depends on the ammount of chromium exchanged.
publishDate 2000
dc.date.none.fl_str_mv 2000-03
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/11336/73079
Parentis, Monica Liliana; Bonini, Norberto Alejandro; Gonzo, Elio Emilio; Characterization of silica supported chromium complexes; Planta Piloto de Ingeniería Química; Latin American Applied Research; 30; 1; 3-2000; 41-50
0327-0793
1851-8796
CONICET Digital
CONICET
url http://hdl.handle.net/11336/73079
identifier_str_mv Parentis, Monica Liliana; Bonini, Norberto Alejandro; Gonzo, Elio Emilio; Characterization of silica supported chromium complexes; Planta Piloto de Ingeniería Química; Latin American Applied Research; 30; 1; 3-2000; 41-50
0327-0793
1851-8796
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://www.laar.uns.edu.ar/indexes/i30_1.htm
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 Planta Piloto de Ingeniería Química
publisher.none.fl_str_mv Planta Piloto de Ingeniería Química
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 13.22299

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