Preparação e propriedades de zeólitas faujasita contendo cátions amônio

Detalhes bibliográficos
Autor(a) principal: Almeida, Karina Arruda
Data de Publicação: 2010
Outros Autores: Martins, Leandro [UNESP], Cardoso, Dilson
Tipo de documento: Artigo
Idioma: por
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1590/S0100-40422010000500013
http://hdl.handle.net/11449/122926
Resumo: Sodium faujasite zeolites with Si/Al ratio of 1.4 and 2.5 were exchanged with methylammonium cations. The influence of framework aluminum and ion exchange degree in their basic properties were evaluated. These properties were assessed in the Knoevenagel catalytic condensation. The sodium ion exchange was restricted to the supercavity and the exchange degree depended on the cation volume and on the Si/Al ratio. The higher catalytic activity is achieved for the zeolite with the lower Si/Al ratio exchanged with the monomethylammonium cation. The best performance of this catalyst is attributed to the higher basicity in combination with elevated micropore volume.
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spelling Preparação e propriedades de zeólitas faujasita contendo cátions amônioPreparation and properties of faujasite zeolites containing ammonium cationsfaujasite zeólitasbasic catalystmethylammonium cationsSodium faujasite zeolites with Si/Al ratio of 1.4 and 2.5 were exchanged with methylammonium cations. The influence of framework aluminum and ion exchange degree in their basic properties were evaluated. These properties were assessed in the Knoevenagel catalytic condensation. The sodium ion exchange was restricted to the supercavity and the exchange degree depended on the cation volume and on the Si/Al ratio. The higher catalytic activity is achieved for the zeolite with the lower Si/Al ratio exchanged with the monomethylammonium cation. The best performance of this catalyst is attributed to the higher basicity in combination with elevated micropore volume.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Universidade Federal de São Carlos Departamento de Engenharia QuímicaSociedade Brasileira de QuímicaUniversidade Federal de São Carlos Departamento de Engenharia QuímicaAlmeida, Karina ArrudaMartins, Leandro [UNESP]Cardoso, Dilson2015-05-13T16:35:43Z2015-05-13T16:35:43Z2010info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1077-1081application/pdfhttp://dx.doi.org/10.1590/S0100-40422010000500013Química Nova. Sociedade Brasileira de Química, v. 33, n. 5, p. 1077-1081, 2010.0100-4042http://hdl.handle.net/11449/12292610.1590/S0100-40422010000500013S0100-40422010000500013S0100-40422010000500013.pdf5782696565602340SciELOreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporQuímica Nova0.6460,255info:eu-repo/semantics/openAccess2023-12-05T06:16:09Zoai:repositorio.unesp.br:11449/122926Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T19:32:04.111481Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Preparação e propriedades de zeólitas faujasita contendo cátions amônio
Preparation and properties of faujasite zeolites containing ammonium cations
title Preparação e propriedades de zeólitas faujasita contendo cátions amônio
spellingShingle Preparação e propriedades de zeólitas faujasita contendo cátions amônio
Almeida, Karina Arruda
faujasite zeólitas
basic catalyst
methylammonium cations
title_short Preparação e propriedades de zeólitas faujasita contendo cátions amônio
title_full Preparação e propriedades de zeólitas faujasita contendo cátions amônio
title_fullStr Preparação e propriedades de zeólitas faujasita contendo cátions amônio
title_full_unstemmed Preparação e propriedades de zeólitas faujasita contendo cátions amônio
title_sort Preparação e propriedades de zeólitas faujasita contendo cátions amônio
author Almeida, Karina Arruda
author_facet Almeida, Karina Arruda
Martins, Leandro [UNESP]
Cardoso, Dilson
author_role author
author2 Martins, Leandro [UNESP]
Cardoso, Dilson
author2_role author
author
dc.contributor.none.fl_str_mv Universidade Federal de São Carlos Departamento de Engenharia Química
dc.contributor.author.fl_str_mv Almeida, Karina Arruda
Martins, Leandro [UNESP]
Cardoso, Dilson
dc.subject.por.fl_str_mv faujasite zeólitas
basic catalyst
methylammonium cations
topic faujasite zeólitas
basic catalyst
methylammonium cations
description Sodium faujasite zeolites with Si/Al ratio of 1.4 and 2.5 were exchanged with methylammonium cations. The influence of framework aluminum and ion exchange degree in their basic properties were evaluated. These properties were assessed in the Knoevenagel catalytic condensation. The sodium ion exchange was restricted to the supercavity and the exchange degree depended on the cation volume and on the Si/Al ratio. The higher catalytic activity is achieved for the zeolite with the lower Si/Al ratio exchanged with the monomethylammonium cation. The best performance of this catalyst is attributed to the higher basicity in combination with elevated micropore volume.
publishDate 2010
dc.date.none.fl_str_mv 2010
2015-05-13T16:35:43Z
2015-05-13T16:35:43Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1590/S0100-40422010000500013
Química Nova. Sociedade Brasileira de Química, v. 33, n. 5, p. 1077-1081, 2010.
0100-4042
http://hdl.handle.net/11449/122926
10.1590/S0100-40422010000500013
S0100-40422010000500013
S0100-40422010000500013.pdf
5782696565602340
url http://dx.doi.org/10.1590/S0100-40422010000500013
http://hdl.handle.net/11449/122926
identifier_str_mv Química Nova. Sociedade Brasileira de Química, v. 33, n. 5, p. 1077-1081, 2010.
0100-4042
10.1590/S0100-40422010000500013
S0100-40422010000500013
S0100-40422010000500013.pdf
5782696565602340
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv Química Nova
0.646
0,255
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 1077-1081
application/pdf
dc.publisher.none.fl_str_mv Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv SciELO
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
_version_ 1808129082333855744

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