Interesterificação de óleo de soja para produção de ésteres metílicos de ácidos graxos catalisada por óxido de cálcio
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Manancial - Repositório Digital da UFSM |
Texto Completo: | http://repositorio.ufsm.br/handle/1/16560 |
Resumo: | Price instability of fossil fuels and search for renewable energies have stimulated government programs to increase the percentage of biodiesel in diesel. This biofuel is generally produced by the transesterification reaction, however the various stages of purification to obtain a clean biodiesel, glycerin market saturation and the effluents generated demand the study of new routes for this biofuel production. This study evaluated heterogeneous interesterification from soybean oil and methyl acetate, catalyzed by calcium oxide. Catalyst obtained from calcium carbonate was tested in the reaction after different calcination temperatures, and the hydration-dehydration technique was used to produce nanocrystalline catalyst. CaO samples were characterized by X-ray diffraction, thermogravimetric analysis, Fourier transform infrared spectroscopy, scanning electron microscopy and N2-physisorption at 77K. Interesterification reaction at 275 °C, 1:40 molar ratio oil: methyl acetate and 6 wt% catalyst content for 120 minutes was used with Tukey's test to determine the best calcination temperature, equal to 800 °C. Selected catalyst was used in kinetic experiments to evaluate the effect of temperature, catalyst concentration and oil: methyl acetate molar ratio. The optimum condition was 325 °C, catalyst content of 10 wt%, and 1:40 oil: methyl acetate molar ratio, with a 62.3 wt% fatty acid methyl esters content. Reuse catalyst was tested and the results showed a decreasing catalytic activity. Leaching test and FTIR analysis of the catalyst pointed out to mass loss and adsorbents at the basic sites would be contributing to CaO deactivation. |
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2019-05-14T15:50:35Z2019-05-14T15:50:35Z2018-08-02http://repositorio.ufsm.br/handle/1/16560Price instability of fossil fuels and search for renewable energies have stimulated government programs to increase the percentage of biodiesel in diesel. This biofuel is generally produced by the transesterification reaction, however the various stages of purification to obtain a clean biodiesel, glycerin market saturation and the effluents generated demand the study of new routes for this biofuel production. This study evaluated heterogeneous interesterification from soybean oil and methyl acetate, catalyzed by calcium oxide. Catalyst obtained from calcium carbonate was tested in the reaction after different calcination temperatures, and the hydration-dehydration technique was used to produce nanocrystalline catalyst. CaO samples were characterized by X-ray diffraction, thermogravimetric analysis, Fourier transform infrared spectroscopy, scanning electron microscopy and N2-physisorption at 77K. Interesterification reaction at 275 °C, 1:40 molar ratio oil: methyl acetate and 6 wt% catalyst content for 120 minutes was used with Tukey's test to determine the best calcination temperature, equal to 800 °C. Selected catalyst was used in kinetic experiments to evaluate the effect of temperature, catalyst concentration and oil: methyl acetate molar ratio. The optimum condition was 325 °C, catalyst content of 10 wt%, and 1:40 oil: methyl acetate molar ratio, with a 62.3 wt% fatty acid methyl esters content. Reuse catalyst was tested and the results showed a decreasing catalytic activity. Leaching test and FTIR analysis of the catalyst pointed out to mass loss and adsorbents at the basic sites would be contributing to CaO deactivation.A instabilidade no preço dos combustíveis fósseis e a busca por energias renováveis têm estimulado os programas governamentais a aumentar a porcentagem de biodiesel no diesel. Este biocombustível é geralmente produzido pela reação de transesterificação, no entanto as diversas etapas de purificação para obtenção de um biodiesel limpo, a saturação do mercado da glicerina e os efluentes gerados demandam que sejam estudadas novas rotas para produção de biodiesel. Este estudo avaliou a interesterificação heterogênea do óleo de soja com acetato de metila, catalisada por óxido de cálcio. O catalisador proveniente do carbonato de cálcio foi testado na reação após calcinação em diferentes temperaturas, e a técnica de hidrataçãodesidratação foi utilizada para produzir catalisador nanocristalino. As amostras de CaO foram caracterizadas por difração de raio–X (DRX), análise termogravimétrica, espectroscopia de infravermelho por transformada de Fourier (FTIR), microscopia eletrônica de varredura (MEV) e fisissorção de N2 a 77 K. Reação de interesterificação a 275 °C, proporção molar 1:40 óleo:acetato de metila e teor de catalisador de 6 % em massa por 120 minutos foi usada com o teste de Tukey para determinar a melhor temperatura de calcinação, igual a 800 °C. O catalisador selecionado foi usado em experimentos cinéticos para avaliar o efeito da temperatura, concentração de catalisador e razão molar óleo:acetato de metila. A condição ótima foi 325 °C, teor de catalisador de 10% em massa, e razão molar óleo:acetato de metila de 1:40, com um teor de 62,3% em massa de ésteres metílicos de ácidos graxos (EMAG). O reuso do catalisador foi testado e os resultados mostraram uma atividade catalítica decrescente. Testes de lixiviação e análises FTIR do catalisador indicaram perda de massa e presença de adsorventes nos sítios básicos, contribuindo para a desativação do CaO.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESporUniversidade Federal de Santa MariaCentro de TecnologiaPrograma de Pós-Graduação em Engenharia QuímicaUFSMBrasilEngenharia QuímicaAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessÉster metílicoTriacetinaCatálise heterogêneaCinéticaAcetato de metilaMethyl esterTriacetinHeterogeneous catalysisKineticsMethyl acetateCNPQ::ENGENHARIAS::ENGENHARIA QUIMICAInteresterificação de óleo de soja para produção de ésteres metílicos de ácidos graxos catalisada por óxido de cálcioInteresterification of soybean oil to fatty acid methyl esters production catalysed by calcium oxideinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisCastilhos, Fernanda dehttp://lattes.cnpq.br/4590978604104577Mayer, Flávio Diashttp://lattes.cnpq.br/4268416135140359Enzweiler, Hevelinehttp://lattes.cnpq.br/0460668255910901http://lattes.cnpq.br/9700750036560486Nunes, Ana Luiza Barrachini300600000006600340e815f-99e3-423d-b9d8-4333d082cb0f881641b3-d0b3-41b6-8d0c-cd74331c2dd209dcf6ff-148f-4eea-a9ca-8c41de18d27d282387e6-fae6-4d1d-9d44-1d159317deb4reponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMCC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8805http://repositorio.ufsm.br/bitstream/1/16560/2/license_rdf4460e5956bc1d1639be9ae6146a50347MD52LICENSElicense.txtlicense.txttext/plain; charset=utf-816http://repositorio.ufsm.br/bitstream/1/16560/3/license.txtf8fcb28efb1c8cf0dc096bec902bf4c4MD53ORIGINALDIS_PPGEQ_2018_NUNES_ANA.pdfDIS_PPGEQ_2018_NUNES_ANA.pdfDissertação de Mestradoapplication/pdf1821582http://repositorio.ufsm.br/bitstream/1/16560/1/DIS_PPGEQ_2018_NUNES_ANA.pdfa3ba0c69e243d5c0e3ba505b1869f127MD51TEXTDIS_PPGEQ_2018_NUNES_ANA.pdf.txtDIS_PPGEQ_2018_NUNES_ANA.pdf.txtExtracted texttext/plain110134http://repositorio.ufsm.br/bitstream/1/16560/4/DIS_PPGEQ_2018_NUNES_ANA.pdf.txtf9b176218dd9b69034331f888b56d50cMD54THUMBNAILDIS_PPGEQ_2018_NUNES_ANA.pdf.jpgDIS_PPGEQ_2018_NUNES_ANA.pdf.jpgIM Thumbnailimage/jpeg4429http://repositorio.ufsm.br/bitstream/1/16560/5/DIS_PPGEQ_2018_NUNES_ANA.pdf.jpgf83712e2adf65b39a3b8934f646867e9MD551/165602019-05-15 03:01:14.88oai:repositorio.ufsm.br:1/16560Q3JlYXRpdmUgQ29tbW9ucw==Repositório Institucionalhttp://repositorio.ufsm.br/PUBhttp://repositorio.ufsm.br/oai/requestopendoar:39132019-05-15T06:01:14Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)false |
dc.title.por.fl_str_mv |
Interesterificação de óleo de soja para produção de ésteres metílicos de ácidos graxos catalisada por óxido de cálcio |
dc.title.alternative.eng.fl_str_mv |
Interesterification of soybean oil to fatty acid methyl esters production catalysed by calcium oxide |
title |
Interesterificação de óleo de soja para produção de ésteres metílicos de ácidos graxos catalisada por óxido de cálcio |
spellingShingle |
Interesterificação de óleo de soja para produção de ésteres metílicos de ácidos graxos catalisada por óxido de cálcio Nunes, Ana Luiza Barrachini Éster metílico Triacetina Catálise heterogênea Cinética Acetato de metila Methyl ester Triacetin Heterogeneous catalysis Kinetics Methyl acetate CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
title_short |
Interesterificação de óleo de soja para produção de ésteres metílicos de ácidos graxos catalisada por óxido de cálcio |
title_full |
Interesterificação de óleo de soja para produção de ésteres metílicos de ácidos graxos catalisada por óxido de cálcio |
title_fullStr |
Interesterificação de óleo de soja para produção de ésteres metílicos de ácidos graxos catalisada por óxido de cálcio |
title_full_unstemmed |
Interesterificação de óleo de soja para produção de ésteres metílicos de ácidos graxos catalisada por óxido de cálcio |
title_sort |
Interesterificação de óleo de soja para produção de ésteres metílicos de ácidos graxos catalisada por óxido de cálcio |
author |
Nunes, Ana Luiza Barrachini |
author_facet |
Nunes, Ana Luiza Barrachini |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Castilhos, Fernanda de |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/4590978604104577 |
dc.contributor.referee1.fl_str_mv |
Mayer, Flávio Dias |
dc.contributor.referee1Lattes.fl_str_mv |
http://lattes.cnpq.br/4268416135140359 |
dc.contributor.referee2.fl_str_mv |
Enzweiler, Heveline |
dc.contributor.referee2Lattes.fl_str_mv |
http://lattes.cnpq.br/0460668255910901 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/9700750036560486 |
dc.contributor.author.fl_str_mv |
Nunes, Ana Luiza Barrachini |
contributor_str_mv |
Castilhos, Fernanda de Mayer, Flávio Dias Enzweiler, Heveline |
dc.subject.por.fl_str_mv |
Éster metílico Triacetina Catálise heterogênea Cinética Acetato de metila |
topic |
Éster metílico Triacetina Catálise heterogênea Cinética Acetato de metila Methyl ester Triacetin Heterogeneous catalysis Kinetics Methyl acetate CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
dc.subject.eng.fl_str_mv |
Methyl ester Triacetin Heterogeneous catalysis Kinetics Methyl acetate |
dc.subject.cnpq.fl_str_mv |
CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
description |
Price instability of fossil fuels and search for renewable energies have stimulated government programs to increase the percentage of biodiesel in diesel. This biofuel is generally produced by the transesterification reaction, however the various stages of purification to obtain a clean biodiesel, glycerin market saturation and the effluents generated demand the study of new routes for this biofuel production. This study evaluated heterogeneous interesterification from soybean oil and methyl acetate, catalyzed by calcium oxide. Catalyst obtained from calcium carbonate was tested in the reaction after different calcination temperatures, and the hydration-dehydration technique was used to produce nanocrystalline catalyst. CaO samples were characterized by X-ray diffraction, thermogravimetric analysis, Fourier transform infrared spectroscopy, scanning electron microscopy and N2-physisorption at 77K. Interesterification reaction at 275 °C, 1:40 molar ratio oil: methyl acetate and 6 wt% catalyst content for 120 minutes was used with Tukey's test to determine the best calcination temperature, equal to 800 °C. Selected catalyst was used in kinetic experiments to evaluate the effect of temperature, catalyst concentration and oil: methyl acetate molar ratio. The optimum condition was 325 °C, catalyst content of 10 wt%, and 1:40 oil: methyl acetate molar ratio, with a 62.3 wt% fatty acid methyl esters content. Reuse catalyst was tested and the results showed a decreasing catalytic activity. Leaching test and FTIR analysis of the catalyst pointed out to mass loss and adsorbents at the basic sites would be contributing to CaO deactivation. |
publishDate |
2018 |
dc.date.issued.fl_str_mv |
2018-08-02 |
dc.date.accessioned.fl_str_mv |
2019-05-14T15:50:35Z |
dc.date.available.fl_str_mv |
2019-05-14T15:50:35Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://repositorio.ufsm.br/handle/1/16560 |
url |
http://repositorio.ufsm.br/handle/1/16560 |
dc.language.iso.fl_str_mv |
por |
language |
por |
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300600000006 |
dc.relation.confidence.fl_str_mv |
600 |
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340e815f-99e3-423d-b9d8-4333d082cb0f 881641b3-d0b3-41b6-8d0c-cd74331c2dd2 09dcf6ff-148f-4eea-a9ca-8c41de18d27d 282387e6-fae6-4d1d-9d44-1d159317deb4 |
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Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
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Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Centro de Tecnologia |
dc.publisher.program.fl_str_mv |
Programa de Pós-Graduação em Engenharia Química |
dc.publisher.initials.fl_str_mv |
UFSM |
dc.publisher.country.fl_str_mv |
Brasil |
dc.publisher.department.fl_str_mv |
Engenharia Química |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Centro de Tecnologia |
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