Zeólitas ácidas aplicadas na esterificação catalítica
Autor(a) principal: | |
---|---|
Data de Publicação: | 2019 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFSCAR |
Texto Completo: | https://repositorio.ufscar.br/handle/ufscar/11959 |
Resumo: | With respect the sugarcane sector expansion in Brazil, significant quantities of by-products have been generated, among them the fusel oil with potential for reuse due to the high volume produced and its rich isopentanol alcohol composition. An alternative of reuse is the transformation of this alcohol into ester, in this case, isopentyl acetate widely used in industries as flavors, solvents and others. In this context, the objective of the work was to apply commercial Si zeolites Si / Al = 15 and MFI with ratios (11.5, 15 and 25) in the protonated form as catalysts for the catalytic esterification of acetic acid the alcohols isopentanol and 1pentanol, in order to investigate the influence of the acidity, structure, and particle size of the catalysts in the catalytic activity. For this, the catalysts were characterized by: thermogravimetric analysis (ATG), X-ray diffractometry (DRX), nitrogen adsorption, scanning electron microscopy (MEV), desorption of ammonia at program temperature (DTP-NH3), spectroscopy energy dispersion (EDS) and X-ray fluorescence (FRX). By using the characterization techniques, it was found that commercially purchased materials corresponded to the one reported by the manufacturer. In addition, the characterization of samples with MFI structure showed that the Si / Al ratio has influence on shape, particle size, and acidity. In the catalytic tests, it was found that when comparing the MFI and USY structures with Si / Al = 15, it is not possible to identify which parameter had an influence on the catalytic activity, due to the number of variables. However, an improvement in the performance of the catalysts with the MFI structure with the increase of the Si / Al ratio was observed, this fact was attributed to the increase of the external surface. |
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Ribeiro, Maria EduardaCardoso, Dilsonhttp://lattes.cnpq.br/2462847535959232http://lattes.cnpq.br/147900010330758010e84143-ef62-473d-8628-581cbecd377e2019-10-21T13:11:26Z2019-10-21T13:11:26Z2019-03-08RIBEIRO, Maria Eduarda. Zeólitas ácidas aplicadas na esterificação catalítica. 2019. Dissertação (Mestrado em Engenharia Química) – Universidade Federal de São Carlos, São Carlos, 2019. Disponível em: https://repositorio.ufscar.br/handle/ufscar/11959.https://repositorio.ufscar.br/handle/ufscar/11959With respect the sugarcane sector expansion in Brazil, significant quantities of by-products have been generated, among them the fusel oil with potential for reuse due to the high volume produced and its rich isopentanol alcohol composition. An alternative of reuse is the transformation of this alcohol into ester, in this case, isopentyl acetate widely used in industries as flavors, solvents and others. In this context, the objective of the work was to apply commercial Si zeolites Si / Al = 15 and MFI with ratios (11.5, 15 and 25) in the protonated form as catalysts for the catalytic esterification of acetic acid the alcohols isopentanol and 1pentanol, in order to investigate the influence of the acidity, structure, and particle size of the catalysts in the catalytic activity. For this, the catalysts were characterized by: thermogravimetric analysis (ATG), X-ray diffractometry (DRX), nitrogen adsorption, scanning electron microscopy (MEV), desorption of ammonia at program temperature (DTP-NH3), spectroscopy energy dispersion (EDS) and X-ray fluorescence (FRX). By using the characterization techniques, it was found that commercially purchased materials corresponded to the one reported by the manufacturer. In addition, the characterization of samples with MFI structure showed that the Si / Al ratio has influence on shape, particle size, and acidity. In the catalytic tests, it was found that when comparing the MFI and USY structures with Si / Al = 15, it is not possible to identify which parameter had an influence on the catalytic activity, due to the number of variables. However, an improvement in the performance of the catalysts with the MFI structure with the increase of the Si / Al ratio was observed, this fact was attributed to the increase of the external surface.Em meio a expansão do setor sucroalcooleiro no Brasil, quantidades significativas de subprodutos têm sido gerados, dentre esses o óleo fúsel com potencial de reaproveitamento, devido ao elevado volume produzido e sua composição rica em álcool isopentanol. Uma alternativa de reuso é a transformação desse álcool em éster, no caso acetato de isopentila amplamente empregado nas indústrias como aromatizantes, solventes e outros. Nesse contexto, o trabalho teve como objetivo aplicar as zeólitas comerciais USY com razão Si/Al=15 e MFI com razões (11,5, 15 e 25) na forma protonada como catalisadores para esterificação catalítica em fase líquida do ácido acético com os álcoois isopentanol e 1-pentanol, de modo a investigar a influência da acidez, estrutura, e tamanho de partícula dos catalisadores na atividade catalítica. Para isso, os catalisadores foram caracterizados por: análise termogravimétrica (TG), difratometria de raios X (DRX), fisissorção de nitrogênio, microscopia eletrônica de varredura (MEV), dessorção de amônia a temperatura programa (DTP-NH3), espectroscopias por dispersão de energia (EDS) e fluorescência de raios X (FRX). Ao empregar as técnicas de caracterização, verificou-se que os materiais adquiridos comercialmente correspondem ao informado pelo fabricante, além disso, as caracterizações das amostras com estrutura MFI, mostrou que a razão Si/Al tem influência na forma, tamanho de partícula, e acidez. Já nos testes catalíticos, verificou-se que ao comparar as estruturas MFI e USY com Si/Al=15, não é possível identificar qual parâmetro teve influência na atividade catalítica, devido a quantidade de variáveis. Mas observou-se uma melhora no desempenho dos catalisadores com estrutura MFI com o aumento da razão Si/Al, esse fato, foi atribuído ao aumento da superficies externa.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)CNPq: 132059/2017-7porUniversidade Federal de São CarlosCâmpus São CarlosPrograma de Pós-Graduação em Engenharia Química - PPGEQUFSCarAttribution-NonCommercial-NoDerivs 3.0 Brazilhttp://creativecommons.org/licenses/by-nc-nd/3.0/br/info:eu-repo/semantics/openAccessZeólitasEsterificaçãoÁlcoois pentanóisZeolitesEsterificationPentanols alcoholsENGENHARIAS::ENGENHARIA QUIMICAZeólitas ácidas aplicadas na esterificação catalíticaAcidic zeolites applied in catalytic esterificationinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis60060045193456-2aac-47ce-8120-3995d1ca2a46reponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINALDissertação de Mestrado- Maria Eduarda Ribeiro.pdfDissertação de Mestrado- Maria Eduarda Ribeiro.pdfTexto em pdfapplication/pdf3727621https://repositorio.ufscar.br/bitstream/ufscar/11959/6/Disserta%c3%a7%c3%a3o%20de%20Mestrado-%20Maria%20Eduarda%20Ribeiro.pdf300edafbc4e22a37becdfd70160dbb57MD56Carta Comprovante.pdfCarta Comprovante.pdfComprovanteapplication/pdf478419https://repositorio.ufscar.br/bitstream/ufscar/11959/5/Carta%20Comprovante.pdf3cb17656c2e1ee09e110240ce06ed387MD55CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8811https://repositorio.ufscar.br/bitstream/ufscar/11959/7/license_rdfe39d27027a6cc9cb039ad269a5db8e34MD57TEXTDissertação de Mestrado- Maria Eduarda Ribeiro.pdf.txtDissertação de Mestrado- Maria Eduarda Ribeiro.pdf.txtExtracted texttext/plain108488https://repositorio.ufscar.br/bitstream/ufscar/11959/8/Disserta%c3%a7%c3%a3o%20de%20Mestrado-%20Maria%20Eduarda%20Ribeiro.pdf.txt5b88e48ff0e37ef11c6180dd07bcc580MD58Carta Comprovante.pdf.txtCarta Comprovante.pdf.txtExtracted texttext/plain1https://repositorio.ufscar.br/bitstream/ufscar/11959/10/Carta%20Comprovante.pdf.txt68b329da9893e34099c7d8ad5cb9c940MD510THUMBNAILDissertação de Mestrado- Maria Eduarda Ribeiro.pdf.jpgDissertação de Mestrado- Maria Eduarda Ribeiro.pdf.jpgIM Thumbnailimage/jpeg5624https://repositorio.ufscar.br/bitstream/ufscar/11959/9/Disserta%c3%a7%c3%a3o%20de%20Mestrado-%20Maria%20Eduarda%20Ribeiro.pdf.jpg9e07754725fe66a4bf32b96b94e70cbfMD59Carta Comprovante.pdf.jpgCarta Comprovante.pdf.jpgIM Thumbnailimage/jpeg11769https://repositorio.ufscar.br/bitstream/ufscar/11959/11/Carta%20Comprovante.pdf.jpg03951f3556dd045ef116f846d9a9e36fMD511ufscar/119592023-09-18 18:31:45.413oai:repositorio.ufscar.br:ufscar/11959Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222023-09-18T18:31:45Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.por.fl_str_mv |
Zeólitas ácidas aplicadas na esterificação catalítica |
dc.title.alternative.eng.fl_str_mv |
Acidic zeolites applied in catalytic esterification |
title |
Zeólitas ácidas aplicadas na esterificação catalítica |
spellingShingle |
Zeólitas ácidas aplicadas na esterificação catalítica Ribeiro, Maria Eduarda Zeólitas Esterificação Álcoois pentanóis Zeolites Esterification Pentanols alcohols ENGENHARIAS::ENGENHARIA QUIMICA |
title_short |
Zeólitas ácidas aplicadas na esterificação catalítica |
title_full |
Zeólitas ácidas aplicadas na esterificação catalítica |
title_fullStr |
Zeólitas ácidas aplicadas na esterificação catalítica |
title_full_unstemmed |
Zeólitas ácidas aplicadas na esterificação catalítica |
title_sort |
Zeólitas ácidas aplicadas na esterificação catalítica |
author |
Ribeiro, Maria Eduarda |
author_facet |
Ribeiro, Maria Eduarda |
author_role |
author |
dc.contributor.authorlattes.por.fl_str_mv |
http://lattes.cnpq.br/1479000103307580 |
dc.contributor.author.fl_str_mv |
Ribeiro, Maria Eduarda |
dc.contributor.advisor1.fl_str_mv |
Cardoso, Dilson |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/2462847535959232 |
dc.contributor.authorID.fl_str_mv |
10e84143-ef62-473d-8628-581cbecd377e |
contributor_str_mv |
Cardoso, Dilson |
dc.subject.por.fl_str_mv |
Zeólitas Esterificação |
topic |
Zeólitas Esterificação Álcoois pentanóis Zeolites Esterification Pentanols alcohols ENGENHARIAS::ENGENHARIA QUIMICA |
dc.subject.eng.fl_str_mv |
Álcoois pentanóis Zeolites Esterification Pentanols alcohols |
dc.subject.cnpq.fl_str_mv |
ENGENHARIAS::ENGENHARIA QUIMICA |
description |
With respect the sugarcane sector expansion in Brazil, significant quantities of by-products have been generated, among them the fusel oil with potential for reuse due to the high volume produced and its rich isopentanol alcohol composition. An alternative of reuse is the transformation of this alcohol into ester, in this case, isopentyl acetate widely used in industries as flavors, solvents and others. In this context, the objective of the work was to apply commercial Si zeolites Si / Al = 15 and MFI with ratios (11.5, 15 and 25) in the protonated form as catalysts for the catalytic esterification of acetic acid the alcohols isopentanol and 1pentanol, in order to investigate the influence of the acidity, structure, and particle size of the catalysts in the catalytic activity. For this, the catalysts were characterized by: thermogravimetric analysis (ATG), X-ray diffractometry (DRX), nitrogen adsorption, scanning electron microscopy (MEV), desorption of ammonia at program temperature (DTP-NH3), spectroscopy energy dispersion (EDS) and X-ray fluorescence (FRX). By using the characterization techniques, it was found that commercially purchased materials corresponded to the one reported by the manufacturer. In addition, the characterization of samples with MFI structure showed that the Si / Al ratio has influence on shape, particle size, and acidity. In the catalytic tests, it was found that when comparing the MFI and USY structures with Si / Al = 15, it is not possible to identify which parameter had an influence on the catalytic activity, due to the number of variables. However, an improvement in the performance of the catalysts with the MFI structure with the increase of the Si / Al ratio was observed, this fact was attributed to the increase of the external surface. |
publishDate |
2019 |
dc.date.accessioned.fl_str_mv |
2019-10-21T13:11:26Z |
dc.date.available.fl_str_mv |
2019-10-21T13:11:26Z |
dc.date.issued.fl_str_mv |
2019-03-08 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
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publishedVersion |
dc.identifier.citation.fl_str_mv |
RIBEIRO, Maria Eduarda. Zeólitas ácidas aplicadas na esterificação catalítica. 2019. Dissertação (Mestrado em Engenharia Química) – Universidade Federal de São Carlos, São Carlos, 2019. Disponível em: https://repositorio.ufscar.br/handle/ufscar/11959. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufscar.br/handle/ufscar/11959 |
identifier_str_mv |
RIBEIRO, Maria Eduarda. Zeólitas ácidas aplicadas na esterificação catalítica. 2019. Dissertação (Mestrado em Engenharia Química) – Universidade Federal de São Carlos, São Carlos, 2019. Disponível em: https://repositorio.ufscar.br/handle/ufscar/11959. |
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https://repositorio.ufscar.br/handle/ufscar/11959 |
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por |
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600 600 |
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Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ info:eu-repo/semantics/openAccess |
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Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ |
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openAccess |
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Universidade Federal de São Carlos Câmpus São Carlos |
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Programa de Pós-Graduação em Engenharia Química - PPGEQ |
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UFSCar |
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Universidade Federal de São Carlos Câmpus São Carlos |
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