Transesterificação de óleo de soja com carbonato de dimetila catalisada por metóxido de potássio
Ano de defesa: | 2017 |
---|---|
Autor(a) principal: | |
Orientador(a): | |
Banca de defesa: | , |
Tipo de documento: | Dissertação |
Tipo de acesso: | Acesso aberto |
Idioma: | por |
Instituição de defesa: |
Universidade Federal de Santa Maria
Centro de Tecnologia |
Programa de Pós-Graduação: |
Programa de Pós-Graduação em Engenharia Química
|
Departamento: |
Engenharia Química
|
País: |
Brasil
|
Palavras-chave em Português: | |
Palavras-chave em Inglês: | |
Área do conhecimento CNPq: | |
Link de acesso: | http://repositorio.ufsm.br/handle/1/14053 |
Resumo: | World biodiesel production is growing up every year mainly due to government policies that require its consumption. However, biodiesel self-cost still makes it uncompetitive compared to petrodiesel, and one of the reasons is the chemical route currently used for its production, which generates glycerol as a co-product. As a result, alternative chemical routes have emerged, such as transesterification with dimethyl carbonate using alkaline catalysts. Therefore, the aim of this work was to evaluate the transesterification reaction of soybean oil with dimethyl carbonate catalyzed by potassium methoxide to produce biodiesel. A recrystallization process of the catalyst was developed in the presence of methanol. Reaction variables were evaluated as time, temperature, reagent molar ratio and catalyst concentration. The best condition was 80 °C, 6: 1 dimethyl carbonate to oil molar ratio and 2wt% of catalyst relative to oil for 15 minutes of reaction with a triglycerides conversion higher than 99%. Methanol influence on the reaction medium was also investigated. Besides, the comparison between catalyzed reactions with the recrystallized and non-recrystallized catalyst was performed, resulting in higher conversions for recrystallized catalyst. Potassium quantification in the biodiesel phase was also carried out, indicating that a washing step in the biodiesel was necessary to remove the catalyst. Recrystallization process showed to be efficient and increased the reaction rate, consuming all soybean oil in a short time. |
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2018-08-15T21:10:14Z2018-08-15T21:10:14Z2017-08-04http://repositorio.ufsm.br/handle/1/14053World biodiesel production is growing up every year mainly due to government policies that require its consumption. However, biodiesel self-cost still makes it uncompetitive compared to petrodiesel, and one of the reasons is the chemical route currently used for its production, which generates glycerol as a co-product. As a result, alternative chemical routes have emerged, such as transesterification with dimethyl carbonate using alkaline catalysts. Therefore, the aim of this work was to evaluate the transesterification reaction of soybean oil with dimethyl carbonate catalyzed by potassium methoxide to produce biodiesel. A recrystallization process of the catalyst was developed in the presence of methanol. Reaction variables were evaluated as time, temperature, reagent molar ratio and catalyst concentration. The best condition was 80 °C, 6: 1 dimethyl carbonate to oil molar ratio and 2wt% of catalyst relative to oil for 15 minutes of reaction with a triglycerides conversion higher than 99%. Methanol influence on the reaction medium was also investigated. Besides, the comparison between catalyzed reactions with the recrystallized and non-recrystallized catalyst was performed, resulting in higher conversions for recrystallized catalyst. Potassium quantification in the biodiesel phase was also carried out, indicating that a washing step in the biodiesel was necessary to remove the catalyst. Recrystallization process showed to be efficient and increased the reaction rate, consuming all soybean oil in a short time.A produção mundial de biodiesel vem crescendo a cada ano devido principalmente a políticas governamentais que obrigam o seu consumo. Porém, o alto custo do biodiesel ainda faz dele pouco competitivo frente ao petrodiesel, e uma das causas é a rota química atualmente empregada para sua produção, que gera glicerol como coproduto. Em decorrência disso, rotas químicas alternativas vêm surgindo, como a transesterificação com carbonato de dimetila usando catalisadores básicos. Assim, o objetivo deste trabalho foi avaliar a reação de transesterificação do óleo de soja com carbonato de dimetila catalisada por metóxido de potássio para obtenção de biodiesel. Um processo de recristalização do catalisador foi desenvolvido na presença de metanol. Variáveis de reação como tempo, temperatura, razão molar de reagentes e concentração de catalisador foram avaliadas. A melhor condição encontrada foi 80 ºC, razão molar de carbonato de dimetila para óleo de 6:1, 2% em massa de catalisador em relação ao óleo e 15 minutos de reação, com mais de 99% de conversão de triglicerídeos. Também foi investigada a influência do metanol no meio reacional. Foi conduzida uma comparação de reações catalisadas com o catalisador recristalizado e não recristalizado, o que resultou em maiores conversões com catalisador recristalizado. A quantificação de potássio na fase biodiesel também foi realizada, indicando ser necessária uma etapa de lavagem no biodiesel para retirada de catalisador. O processo de recristalização se mostrou eficiente e elevou a taxa de reação, consumindo completamente o óleo de soja em pouco tempo.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/openAccessBiodieselCarbonato de dimetilaMetóxido de potássioTransesterificaçãoBiodieselDimethyl carbonatePotassium metoxideTransesterificationCNPQ::ENGENHARIAS::ENGENHARIA QUIMICATransesterificação de óleo de soja com carbonato de dimetila catalisada por metóxido de potássioTransesterification of soybean oil and dimethyl carbonate catalyzed by potassium methoxideinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisCastilhos, Fernanda dehttp://lattes.cnpq.br/4590978604104577Bizzi, Cezar Augustohttp://lattes.cnpq.br/2975070149037006Yamamoto, Carlos Itsuohttp://lattes.cnpq.br/8228545724792492Salau, Nina Paula Gonçalveshttp://lattes.cnpq.br/4234840503539989http://lattes.cnpq.br/8368111044504816Celante, Dian300600000006600340e815f-99e3-423d-b9d8-4333d082cb0fc5eb678d-103f-4329-b5dc-f7ef2e88374f3a4bcf06-d39b-4d7a-b7fa-13c813afd8a36b7e8796-bbc7-41f4-91e5-7a7c21db572faa69464a-8382-4a16-aecf-67804cf29069reponame:Biblioteca Digital de Teses e Dissertações do UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMORIGINALDIS_PPGEQ_2017_CELANTE_DIAN.pdfDIS_PPGEQ_2017_CELANTE_DIAN.pdfDissertação de Mestradoapplication/pdf1008267http://repositorio.ufsm.br/bitstream/1/14053/1/DIS_PPGEQ_2017_CELANTE_DIAN.pdf68a579b47e0be7835077d483de69bf16MD51CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8804http://repositorio.ufsm.br/bitstream/1/14053/2/license_rdfc1efe8e24d7281448e873be30ea326ffMD52LICENSElicense.txtlicense.txttext/plain; charset=utf-816http://repositorio.ufsm.br/bitstream/1/14053/3/license.txtf8fcb28efb1c8cf0dc096bec902bf4c4MD53TEXTDIS_PPGEQ_2017_CELANTE_DIAN.pdf.txtDIS_PPGEQ_2017_CELANTE_DIAN.pdf.txtExtracted texttext/plain129017http://repositorio.ufsm.br/bitstream/1/14053/4/DIS_PPGEQ_2017_CELANTE_DIAN.pdf.txt56d873ab3b762ffa227f5ed3ab7dc68aMD54THUMBNAILDIS_PPGEQ_2017_CELANTE_DIAN.pdf.jpgDIS_PPGEQ_2017_CELANTE_DIAN.pdf.jpgIM Thumbnailimage/jpeg4157http://repositorio.ufsm.br/bitstream/1/14053/5/DIS_PPGEQ_2017_CELANTE_DIAN.pdf.jpge6e48fe424a1d4fe44dee72e83444bc9MD551/140532018-08-15 18:10:14.468oai:repositorio.ufsm.br:1/14053Q3JlYXRpdmUgQ29tbW9ucw==Biblioteca Digital de Teses e Dissertaçõeshttps://repositorio.ufsm.br/ONGhttps://repositorio.ufsm.br/oai/requestatendimento.sib@ufsm.br||tedebc@gmail.comopendoar:2018-08-15T21:10:14Biblioteca Digital de Teses e Dissertações do UFSM - Universidade Federal de Santa Maria (UFSM)false |
dc.title.por.fl_str_mv |
Transesterificação de óleo de soja com carbonato de dimetila catalisada por metóxido de potássio |
dc.title.alternative.eng.fl_str_mv |
Transesterification of soybean oil and dimethyl carbonate catalyzed by potassium methoxide |
title |
Transesterificação de óleo de soja com carbonato de dimetila catalisada por metóxido de potássio |
spellingShingle |
Transesterificação de óleo de soja com carbonato de dimetila catalisada por metóxido de potássio Celante, Dian Biodiesel Carbonato de dimetila Metóxido de potássio Transesterificação Biodiesel Dimethyl carbonate Potassium metoxide Transesterification CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
title_short |
Transesterificação de óleo de soja com carbonato de dimetila catalisada por metóxido de potássio |
title_full |
Transesterificação de óleo de soja com carbonato de dimetila catalisada por metóxido de potássio |
title_fullStr |
Transesterificação de óleo de soja com carbonato de dimetila catalisada por metóxido de potássio |
title_full_unstemmed |
Transesterificação de óleo de soja com carbonato de dimetila catalisada por metóxido de potássio |
title_sort |
Transesterificação de óleo de soja com carbonato de dimetila catalisada por metóxido de potássio |
author |
Celante, Dian |
author_facet |
Celante, Dian |
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.advisor-co1.fl_str_mv |
Bizzi, Cezar Augusto |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://lattes.cnpq.br/2975070149037006 |
dc.contributor.referee1.fl_str_mv |
Yamamoto, Carlos Itsuo |
dc.contributor.referee1Lattes.fl_str_mv |
http://lattes.cnpq.br/8228545724792492 |
dc.contributor.referee2.fl_str_mv |
Salau, Nina Paula Gonçalves |
dc.contributor.referee2Lattes.fl_str_mv |
http://lattes.cnpq.br/4234840503539989 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/8368111044504816 |
dc.contributor.author.fl_str_mv |
Celante, Dian |
contributor_str_mv |
Castilhos, Fernanda de Bizzi, Cezar Augusto Yamamoto, Carlos Itsuo Salau, Nina Paula Gonçalves |
dc.subject.por.fl_str_mv |
Biodiesel Carbonato de dimetila Metóxido de potássio Transesterificação |
topic |
Biodiesel Carbonato de dimetila Metóxido de potássio Transesterificação Biodiesel Dimethyl carbonate Potassium metoxide Transesterification CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
dc.subject.eng.fl_str_mv |
Biodiesel Dimethyl carbonate Potassium metoxide Transesterification |
dc.subject.cnpq.fl_str_mv |
CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
description |
World biodiesel production is growing up every year mainly due to government policies that require its consumption. However, biodiesel self-cost still makes it uncompetitive compared to petrodiesel, and one of the reasons is the chemical route currently used for its production, which generates glycerol as a co-product. As a result, alternative chemical routes have emerged, such as transesterification with dimethyl carbonate using alkaline catalysts. Therefore, the aim of this work was to evaluate the transesterification reaction of soybean oil with dimethyl carbonate catalyzed by potassium methoxide to produce biodiesel. A recrystallization process of the catalyst was developed in the presence of methanol. Reaction variables were evaluated as time, temperature, reagent molar ratio and catalyst concentration. The best condition was 80 °C, 6: 1 dimethyl carbonate to oil molar ratio and 2wt% of catalyst relative to oil for 15 minutes of reaction with a triglycerides conversion higher than 99%. Methanol influence on the reaction medium was also investigated. Besides, the comparison between catalyzed reactions with the recrystallized and non-recrystallized catalyst was performed, resulting in higher conversions for recrystallized catalyst. Potassium quantification in the biodiesel phase was also carried out, indicating that a washing step in the biodiesel was necessary to remove the catalyst. Recrystallization process showed to be efficient and increased the reaction rate, consuming all soybean oil in a short time. |
publishDate |
2017 |
dc.date.issued.fl_str_mv |
2017-08-04 |
dc.date.accessioned.fl_str_mv |
2018-08-15T21:10:14Z |
dc.date.available.fl_str_mv |
2018-08-15T21:10:14Z |
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/1/14053 |
url |
http://repositorio.ufsm.br/handle/1/14053 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.cnpq.fl_str_mv |
300600000006 |
dc.relation.confidence.fl_str_mv |
600 |
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340e815f-99e3-423d-b9d8-4333d082cb0f c5eb678d-103f-4329-b5dc-f7ef2e88374f 3a4bcf06-d39b-4d7a-b7fa-13c813afd8a3 6b7e8796-bbc7-41f4-91e5-7a7c21db572f aa69464a-8382-4a16-aecf-67804cf29069 |
dc.rights.driver.fl_str_mv |
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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