Ion exchange with alkaline earth in zeolites: effects of exchanging time on acid and basic characteristics

Detalhes bibliográficos
Autor(a) principal: da Silva, Classius Ferreira
Data de Publicação: 2008
Outros Autores: Yoshida, Carla Kazumi Carrascoza, Machado, Nádia Regina Camargo Fernandes, Maugeri Filho, Francisco
Tipo de documento: Artigo
Idioma: por
Título da fonte: Acta scientiarum. Technology (Online)
Texto Completo: http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/3170
Resumo: The isopropanol decomposition is used as a model reaction for determining the acid or basic characteristics of zeolites, specially zeolites of the type Y due to the facility of decomposition in both sites. The acid sites produce water and propene, while the basic sites produce acetone and hydrogen. Zeolites exchanged with alkaline earth may carry out both sites due to their bivalent charges. In this research paper two types of zeolites (A and Y) underwent ion exchange according to an experimental design with the following parameters: cation introduction (Ca+2 or Ba+2) and exchanging time (5 minutes or 24 hours). The zeolites obtained were characterized by X-ray fluorescence, superficial area, and acidity/basicidity by the model reaction of isopropanol decomposition. It was verified that ion exchange modified acidity/basicidity in zeolites.
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spelling Ion exchange with alkaline earth in zeolites: effects of exchanging time on acid and basic characteristicsEfeito do tempo de troca iônica de metais alcalinos na acidez/basicidade de zeólitastroca iônicazeólitasdesidrogenaçãodesidratação3.06.00.00-6 Engenharia QuímicaThe isopropanol decomposition is used as a model reaction for determining the acid or basic characteristics of zeolites, specially zeolites of the type Y due to the facility of decomposition in both sites. The acid sites produce water and propene, while the basic sites produce acetone and hydrogen. Zeolites exchanged with alkaline earth may carry out both sites due to their bivalent charges. In this research paper two types of zeolites (A and Y) underwent ion exchange according to an experimental design with the following parameters: cation introduction (Ca+2 or Ba+2) and exchanging time (5 minutes or 24 hours). The zeolites obtained were characterized by X-ray fluorescence, superficial area, and acidity/basicidity by the model reaction of isopropanol decomposition. It was verified that ion exchange modified acidity/basicidity in zeolites.A reação de decomposição do isopropanol é utilizada como reação modelo para determinar o caráter ácido ou básico de zeólitas, particularmente da zeólita Y, pela facilidade de decompor em ambos os sítios. Sítios ácidos produzem água e propeno, já os sítios básicos produzem acetona e hidrogênio. Os metais alcalinos terrosos, por serem bivalentes, quando introduzidos na zeólita, provocam a formação de ambos os sítios. Neste trabalho, dois tipos de zeólitas (A e Y) foram submetidos à troca iônica segundo um planejamento fatorial cujas variáveis foram o cátion introduzido na zeólita (cálcio ou bário) e o tempo de troca iônica (5 minutos ou 24 horas). As zeólitas trocadas foram caracterizadas por fluorescência de raio X, área superficial e pela reação modelo de decomposição do isopropanol. Verificou-se que a troca iônica provocou um aumento na acidez e na basicidade das zeólitas.Universidade Estadual De Maringá2008-05-14info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/317010.4025/actascitechnol.v21i0.3170Acta Scientiarum. Technology; Vol 21 (1999); 769-772Acta Scientiarum. Technology; v. 21 (1999); 769-7721806-25631807-8664reponame:Acta scientiarum. Technology (Online)instname:Universidade Estadual de Maringá (UEM)instacron:UEMporhttp://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/3170/2354da Silva, Classius FerreiraYoshida, Carla Kazumi CarrascozaMachado, Nádia Regina Camargo FernandesMaugeri Filho, Franciscoinfo:eu-repo/semantics/openAccess2024-05-17T13:02:59Zoai:periodicos.uem.br/ojs:article/3170Revistahttps://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/indexPUBhttps://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/oai||actatech@uem.br1807-86641806-2563opendoar:2024-05-17T13:02:59Acta scientiarum. Technology (Online) - Universidade Estadual de Maringá (UEM)false
dc.title.none.fl_str_mv Ion exchange with alkaline earth in zeolites: effects of exchanging time on acid and basic characteristics
Efeito do tempo de troca iônica de metais alcalinos na acidez/basicidade de zeólitas
title Ion exchange with alkaline earth in zeolites: effects of exchanging time on acid and basic characteristics
spellingShingle Ion exchange with alkaline earth in zeolites: effects of exchanging time on acid and basic characteristics
da Silva, Classius Ferreira
troca iônica
zeólitas
desidrogenação
desidratação
3.06.00.00-6 Engenharia Química
title_short Ion exchange with alkaline earth in zeolites: effects of exchanging time on acid and basic characteristics
title_full Ion exchange with alkaline earth in zeolites: effects of exchanging time on acid and basic characteristics
title_fullStr Ion exchange with alkaline earth in zeolites: effects of exchanging time on acid and basic characteristics
title_full_unstemmed Ion exchange with alkaline earth in zeolites: effects of exchanging time on acid and basic characteristics
title_sort Ion exchange with alkaline earth in zeolites: effects of exchanging time on acid and basic characteristics
author da Silva, Classius Ferreira
author_facet da Silva, Classius Ferreira
Yoshida, Carla Kazumi Carrascoza
Machado, Nádia Regina Camargo Fernandes
Maugeri Filho, Francisco
author_role author
author2 Yoshida, Carla Kazumi Carrascoza
Machado, Nádia Regina Camargo Fernandes
Maugeri Filho, Francisco
author2_role author
author
author
dc.contributor.author.fl_str_mv da Silva, Classius Ferreira
Yoshida, Carla Kazumi Carrascoza
Machado, Nádia Regina Camargo Fernandes
Maugeri Filho, Francisco
dc.subject.por.fl_str_mv troca iônica
zeólitas
desidrogenação
desidratação
3.06.00.00-6 Engenharia Química
topic troca iônica
zeólitas
desidrogenação
desidratação
3.06.00.00-6 Engenharia Química
description The isopropanol decomposition is used as a model reaction for determining the acid or basic characteristics of zeolites, specially zeolites of the type Y due to the facility of decomposition in both sites. The acid sites produce water and propene, while the basic sites produce acetone and hydrogen. Zeolites exchanged with alkaline earth may carry out both sites due to their bivalent charges. In this research paper two types of zeolites (A and Y) underwent ion exchange according to an experimental design with the following parameters: cation introduction (Ca+2 or Ba+2) and exchanging time (5 minutes or 24 hours). The zeolites obtained were characterized by X-ray fluorescence, superficial area, and acidity/basicidity by the model reaction of isopropanol decomposition. It was verified that ion exchange modified acidity/basicidity in zeolites.
publishDate 2008
dc.date.none.fl_str_mv 2008-05-14
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/3170
10.4025/actascitechnol.v21i0.3170
url http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/3170
identifier_str_mv 10.4025/actascitechnol.v21i0.3170
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/3170/2354
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Estadual De Maringá
publisher.none.fl_str_mv Universidade Estadual De Maringá
dc.source.none.fl_str_mv Acta Scientiarum. Technology; Vol 21 (1999); 769-772
Acta Scientiarum. Technology; v. 21 (1999); 769-772
1806-2563
1807-8664
reponame:Acta scientiarum. Technology (Online)
instname:Universidade Estadual de Maringá (UEM)
instacron:UEM
instname_str Universidade Estadual de Maringá (UEM)
instacron_str UEM
institution UEM
reponame_str Acta scientiarum. Technology (Online)
collection Acta scientiarum. Technology (Online)
repository.name.fl_str_mv Acta scientiarum. Technology (Online) - Universidade Estadual de Maringá (UEM)
repository.mail.fl_str_mv ||actatech@uem.br
_version_ 1799315333118427136

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