TAME synthesis on zeolites

Detalhes bibliográficos
Autor(a) principal: Gonçalves, Gilberto da Cunha
Data de Publicação: 2008
Outros Autores: Gazola, Fernando César, Simoes Dornellas de Barros, Maria Angelica, Arroyo, Pedro Augusto
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/2770
Resumo: Synthesis of TAME catalyzed by zeolites USY, H-Mordenita, H-ZSM-5 and H-Beta was studied. Reactions were carried out in a batch reactor at 80oC and 10 kgf/cm2, using methanol and reactive isoamylenes (2-methyl-1-butene and 2-methyl-2-butene) from a mono-hydrogenated refinery C5 cut. For comparison, experiments were also carried out with Amberlyst 15 acid resin as catalyst. Results showed that zeolite H-Beta has isoamylenes conversion, TAME yield and selectivity, similar to those of Amberlyst 15 and superior than those of the other zeolites, under the studied conditions. Apparently, highly dispersed non-framework alumina species present in H-Beta zeolite would interact with some framework Brönsted acid sites forming sites with enhanced acid strength. Besides the formation of big clusters of methanol molecules, due to the preferential adsorption of methanol, that solvates the acidic proton, this fact leads to the higher activity observed for the synthesis of TAME, when compared to the other zeolites studied
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spelling TAME synthesis on zeolitesSíntese do terc-amil metil éter (TAME) sobre zeólitasTAMEzeólitaacidezeterificação3.06.00.00-6 Engenharia QuímicaSynthesis of TAME catalyzed by zeolites USY, H-Mordenita, H-ZSM-5 and H-Beta was studied. Reactions were carried out in a batch reactor at 80oC and 10 kgf/cm2, using methanol and reactive isoamylenes (2-methyl-1-butene and 2-methyl-2-butene) from a mono-hydrogenated refinery C5 cut. For comparison, experiments were also carried out with Amberlyst 15 acid resin as catalyst. Results showed that zeolite H-Beta has isoamylenes conversion, TAME yield and selectivity, similar to those of Amberlyst 15 and superior than those of the other zeolites, under the studied conditions. Apparently, highly dispersed non-framework alumina species present in H-Beta zeolite would interact with some framework Brönsted acid sites forming sites with enhanced acid strength. Besides the formation of big clusters of methanol molecules, due to the preferential adsorption of methanol, that solvates the acidic proton, this fact leads to the higher activity observed for the synthesis of TAME, when compared to the other zeolites studiedNo presente trabalho foi estudada a síntese do TAME sobre zeólitas USY, H-Mordenita, H-ZSM-5 e H-Beta. As reações foram feitas em um reator batelada, a 80oC e pressão de 10 kgf/cm2, utilizando metanol e isoamilenos reativos (2-metil buteno 1 e 2-metil buteno 2), presentes em um corte C5 de retorno petroquímico mono-hidrogenado. Para efeito de comparação, foram realizados testes utilizando a resina ácida Amberlyst 15 como catalisador. Os resultados obtidos mostraram que a zeólita H-Beta possui conversão de isoamilenos, rendimento e seletividade a TAME comparáveis à da resina Amberlyst 15 e muito superiores às demais zeólitas estudadas, nas condições de reação ora empregadas. Aparentemente, as espécies de alumina extra-rede (ALER) altamente dispersas presentes na H-Beta interagem com alguns sítios ácidos de Brönsted da rede, fazendo com que estes tenham a sua força ácida aumentada. Isto, juntamente com a adsorção preferencial de metanol, que solvata o próton formando grandes “clusters” de moléculas de metanol, conduzem à maior atividade observada para a síntese do TAME sobre a H-Beta, quando comparada às outras zeólitas estudadasUniversidade Estadual De Maringá2008-05-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/277010.4025/actascitechnol.v23i0.2770Acta Scientiarum. Technology; Vol 23 (2001); 1401-1406Acta Scientiarum. Technology; v. 23 (2001); 1401-14061806-25631807-8664reponame:Acta scientiarum. Technology (Online)instname:Universidade Estadual de Maringá (UEM)instacron:UEMporhttp://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/2770/1833Gonçalves, Gilberto da CunhaGazola, Fernando CésarSimoes Dornellas de Barros, Maria AngelicaArroyo, Pedro Augustoinfo:eu-repo/semantics/openAccess2024-05-17T13:02:49Zoai:periodicos.uem.br/ojs:article/2770Revistahttps://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/indexPUBhttps://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/oai||actatech@uem.br1807-86641806-2563opendoar:2024-05-17T13:02:49Acta scientiarum. Technology (Online) - Universidade Estadual de Maringá (UEM)false
dc.title.none.fl_str_mv TAME synthesis on zeolites
Síntese do terc-amil metil éter (TAME) sobre zeólitas
title TAME synthesis on zeolites
spellingShingle TAME synthesis on zeolites
Gonçalves, Gilberto da Cunha
TAME
zeólita
acidez
eterificação
3.06.00.00-6 Engenharia Química
title_short TAME synthesis on zeolites
title_full TAME synthesis on zeolites
title_fullStr TAME synthesis on zeolites
title_full_unstemmed TAME synthesis on zeolites
title_sort TAME synthesis on zeolites
author Gonçalves, Gilberto da Cunha
author_facet Gonçalves, Gilberto da Cunha
Gazola, Fernando César
Simoes Dornellas de Barros, Maria Angelica
Arroyo, Pedro Augusto
author_role author
author2 Gazola, Fernando César
Simoes Dornellas de Barros, Maria Angelica
Arroyo, Pedro Augusto
author2_role author
author
author
dc.contributor.author.fl_str_mv Gonçalves, Gilberto da Cunha
Gazola, Fernando César
Simoes Dornellas de Barros, Maria Angelica
Arroyo, Pedro Augusto
dc.subject.por.fl_str_mv TAME
zeólita
acidez
eterificação
3.06.00.00-6 Engenharia Química
topic TAME
zeólita
acidez
eterificação
3.06.00.00-6 Engenharia Química
description Synthesis of TAME catalyzed by zeolites USY, H-Mordenita, H-ZSM-5 and H-Beta was studied. Reactions were carried out in a batch reactor at 80oC and 10 kgf/cm2, using methanol and reactive isoamylenes (2-methyl-1-butene and 2-methyl-2-butene) from a mono-hydrogenated refinery C5 cut. For comparison, experiments were also carried out with Amberlyst 15 acid resin as catalyst. Results showed that zeolite H-Beta has isoamylenes conversion, TAME yield and selectivity, similar to those of Amberlyst 15 and superior than those of the other zeolites, under the studied conditions. Apparently, highly dispersed non-framework alumina species present in H-Beta zeolite would interact with some framework Brönsted acid sites forming sites with enhanced acid strength. Besides the formation of big clusters of methanol molecules, due to the preferential adsorption of methanol, that solvates the acidic proton, this fact leads to the higher activity observed for the synthesis of TAME, when compared to the other zeolites studied
publishDate 2008
dc.date.none.fl_str_mv 2008-05-05
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/2770
10.4025/actascitechnol.v23i0.2770
url http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/2770
identifier_str_mv 10.4025/actascitechnol.v23i0.2770
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/2770/1833
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 23 (2001); 1401-1406
Acta Scientiarum. Technology; v. 23 (2001); 1401-1406
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
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