Hidróxidos duplos lamelares aplicados à obtenção de biodiesel
Ano de defesa: | 2009 |
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Autor(a) principal: | |
Orientador(a): | |
Banca de defesa: | |
Tipo de documento: | Dissertação |
Tipo de acesso: | Acesso aberto |
Idioma: | por |
Instituição de defesa: |
Universidade Federal do Rio Grande do Norte
|
Programa de Pós-Graduação: |
Programa de Pós-Graduação em Química
|
Departamento: |
Físico-Química; Química
|
País: |
BR
|
Palavras-chave em Português: | |
Palavras-chave em Inglês: | |
Área do conhecimento CNPq: | |
Link de acesso: | https://repositorio.ufrn.br/jspui/handle/123456789/17606 |
Resumo: | In this paper, the Layered Double Hydroxides (LDH s) type hydrotalcite were synthesized, characterized and tested as basic heterogeneous catalysts for the production of biodiesel by transesterification of sunflower oil with methanol. The synthesis of materials Layered Double Hydroxides (LDH s) by co-precipitation method from nitrates of magnesium and aluminum, and sodium carbonate. The materials were submitted to the variation in chemical composition, which is the amount of Mg2+ ions replaced by Al3+. This variation affects the characteristic physico-chemical and reaction the solid. The molar ratio varied in the range of 1:1 and 3:1 magnesium / aluminum, and their values between 0.2 and 0.33. This study aims to evaluate the influence of variation of molar ratio of mixed oxides derived from LDH s and the influence of impregnation of a material with catalytic activity, the KI, the rate of conversion of sunflower oil into methyl esters (biodiesel) through transesterification by heterogeneous catalysis. .The catalysts were calcined at 550 ° C and characterized by X-ray diffraction (XRD), scanning electron microscopy and energy dispersive spectroscopy of X-ray (SEM / EDS), thermogravimetric analysis (TG) and test basicity. The transesterification reaction was performed for reflux is a mixture of sunflower oil and methanol with a molar ratio of 15:1, a reaction time of 4h and a catalyst concentration of 2% by weight. The physical-chemical characterization of sunflower oil and biodiesel obtained by the route methyl submitted according NBR, EN, ASTM. Subsequently, it was with the chromatographic and thermogravimetric characterizations of oils. The results of chromatographic analysis showed that the catalysts were effective in converting vegetable oil into biodiesel, in particular the type hydrotalcite KI-HDL-R1, with a conversion of 99.2%, indicating the strong influence of the chemical composition of the material, in special due to presence of potassium in the structure of the catalyst |
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Alves, Aline Araújohttp://lattes.cnpq.br/0600611836656381http://lattes.cnpq.br/9770622597949866Gondim, Amanda Duartehttp://lattes.cnpq.br/6738828245487480Souza, Luiz Dihttp://lattes.cnpq.br/0589648773241934Araújo, Antônio Souza de2014-12-17T15:41:45Z2010-03-232014-12-17T15:41:45Z2009-08-14ALVES, Aline Araújo. Hidróxidos duplos lamelares aplicados à obtenção de biodiesel. 2009. 112 f. Dissertação (Mestrado em Físico-Química; Química) - Universidade Federal do Rio Grande do Norte, Natal, 2009.https://repositorio.ufrn.br/jspui/handle/123456789/17606In this paper, the Layered Double Hydroxides (LDH s) type hydrotalcite were synthesized, characterized and tested as basic heterogeneous catalysts for the production of biodiesel by transesterification of sunflower oil with methanol. The synthesis of materials Layered Double Hydroxides (LDH s) by co-precipitation method from nitrates of magnesium and aluminum, and sodium carbonate. The materials were submitted to the variation in chemical composition, which is the amount of Mg2+ ions replaced by Al3+. This variation affects the characteristic physico-chemical and reaction the solid. The molar ratio varied in the range of 1:1 and 3:1 magnesium / aluminum, and their values between 0.2 and 0.33. This study aims to evaluate the influence of variation of molar ratio of mixed oxides derived from LDH s and the influence of impregnation of a material with catalytic activity, the KI, the rate of conversion of sunflower oil into methyl esters (biodiesel) through transesterification by heterogeneous catalysis. .The catalysts were calcined at 550 ° C and characterized by X-ray diffraction (XRD), scanning electron microscopy and energy dispersive spectroscopy of X-ray (SEM / EDS), thermogravimetric analysis (TG) and test basicity. The transesterification reaction was performed for reflux is a mixture of sunflower oil and methanol with a molar ratio of 15:1, a reaction time of 4h and a catalyst concentration of 2% by weight. The physical-chemical characterization of sunflower oil and biodiesel obtained by the route methyl submitted according NBR, EN, ASTM. Subsequently, it was with the chromatographic and thermogravimetric characterizations of oils. The results of chromatographic analysis showed that the catalysts were effective in converting vegetable oil into biodiesel, in particular the type hydrotalcite KI-HDL-R1, with a conversion of 99.2%, indicating the strong influence of the chemical composition of the material, in special due to presence of potassium in the structure of the catalystNeste trabalho, hidróxidos duplos lamelares tipo hidrotalcita foram sintetizados, caracterizados e testados como catalisadores heterogêneos básicos para a produção de biodiesel por transesterificação de óleo de girassol com metanol. A síntese dos materiais de hidróxidos duplos lamelares (HDLs) procedeu-se pelo método de co-precipitação, a partir de nitratos de magnésio e de alumínio, carbonato de sódio e hidróxido de sódio. Os materiais foram submetidos à variação na proporção química, que equivale à quantidade de íons Mg2+ substituídos por Al3+. Essa variação afeta as propriedades físico-químicas do material. A razão molar variou na proporção de 1:1 e 3:1 de magnésio/alumínio, estando seus valores entre 0,2 e 0,33. Realizou-se um estudo de impregnação de iodeto de potássio na estrutura dos HDLs, a fim de verificar se ocorre um aumento da basicidade nesses materiais. Os catalisadores obtidos foram calcinados à 550 ºC e caracterizados por difração de raios X (DRX), microscopia eletrônica de varredura e espectroscopia por energia dispersiva de raios X (MEV/EDS), análise termogravimétrica (TG) e teste de basicidade. A reação de transesterificação foi realizada refluxando-se uma mistura de metanol e óleo de girassol com uma razão molar de 15:1, tempo de reação de 4h e uma concentração de 2% em massa de catalisador. A caracterização físico-química do óleo de girassol e dos biodieseis obtidos através da rota metílica apresentou-se de acordo com as normas da NBR, EN, ASTM. Realizaram-se também as caracterizações cromatográficas e termogravimétricas dos biocombustíveis obtidos. Os resultados das análises cromatográficas mostraram que os catalisadores foram eficientes na conversão de óleo vegetal em biodiesel, em especial o tipo hidrotalcita KI-HDL-R1, com uma conversão de 99,2%, indicando a forte influência da composição química do material, particularmente com a presença do iodeto de potássio na estrutura do catalisadorCoordenação de Aperfeiçoamento de Pessoal de Nível Superiorapplication/pdfporUniversidade Federal do Rio Grande do NortePrograma de Pós-Graduação em QuímicaUFRNBRFísico-Química; QuímicaCatalisadorHidróxidos duplos lamelaresBiodieselTransesterificaçãoTermogravimetriaCromatografiaCatalystsHydroxides doubles layeredBiodieselTransesterificationThermogravimetryChromatographyCNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICAHidróxidos duplos lamelares aplicados à obtenção de biodieselinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNORIGINALAlineAApdf.pdfapplication/pdf2403213https://repositorio.ufrn.br/bitstream/123456789/17606/1/AlineAApdf.pdfdfc50c5f35575298ed9005c5d3fb4f7bMD51TEXTAlineAApdf.pdf.txtAlineAApdf.pdf.txtExtracted texttext/plain203745https://repositorio.ufrn.br/bitstream/123456789/17606/6/AlineAApdf.pdf.txtc0dab8408027051b654ff456537843acMD56THUMBNAILAlineAApdf.pdf.jpgAlineAApdf.pdf.jpgIM Thumbnailimage/jpeg4915https://repositorio.ufrn.br/bitstream/123456789/17606/7/AlineAApdf.pdf.jpg97331849747df3be3437591e3dbc3d45MD57123456789/176062017-11-04 11:08:31.702oai:https://repositorio.ufrn.br:123456789/17606Repositório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2017-11-04T14:08:31Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false |
dc.title.por.fl_str_mv |
Hidróxidos duplos lamelares aplicados à obtenção de biodiesel |
title |
Hidróxidos duplos lamelares aplicados à obtenção de biodiesel |
spellingShingle |
Hidróxidos duplos lamelares aplicados à obtenção de biodiesel Alves, Aline Araújo Catalisador Hidróxidos duplos lamelares Biodiesel Transesterificação Termogravimetria Cromatografia Catalysts Hydroxides doubles layered Biodiesel Transesterification Thermogravimetry Chromatography CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA |
title_short |
Hidróxidos duplos lamelares aplicados à obtenção de biodiesel |
title_full |
Hidróxidos duplos lamelares aplicados à obtenção de biodiesel |
title_fullStr |
Hidróxidos duplos lamelares aplicados à obtenção de biodiesel |
title_full_unstemmed |
Hidróxidos duplos lamelares aplicados à obtenção de biodiesel |
title_sort |
Hidróxidos duplos lamelares aplicados à obtenção de biodiesel |
author |
Alves, Aline Araújo |
author_facet |
Alves, Aline Araújo |
author_role |
author |
dc.contributor.authorID.por.fl_str_mv |
|
dc.contributor.authorLattes.por.fl_str_mv |
http://lattes.cnpq.br/0600611836656381 |
dc.contributor.advisorID.por.fl_str_mv |
|
dc.contributor.advisorLattes.por.fl_str_mv |
http://lattes.cnpq.br/9770622597949866 |
dc.contributor.referees1.pt_BR.fl_str_mv |
Gondim, Amanda Duarte |
dc.contributor.referees1ID.por.fl_str_mv |
|
dc.contributor.referees1Lattes.por.fl_str_mv |
http://lattes.cnpq.br/6738828245487480 |
dc.contributor.referees2.pt_BR.fl_str_mv |
Souza, Luiz Di |
dc.contributor.referees2ID.por.fl_str_mv |
|
dc.contributor.referees2Lattes.por.fl_str_mv |
http://lattes.cnpq.br/0589648773241934 |
dc.contributor.author.fl_str_mv |
Alves, Aline Araújo |
dc.contributor.advisor1.fl_str_mv |
Araújo, Antônio Souza de |
contributor_str_mv |
Araújo, Antônio Souza de |
dc.subject.por.fl_str_mv |
Catalisador Hidróxidos duplos lamelares Biodiesel Transesterificação Termogravimetria Cromatografia |
topic |
Catalisador Hidróxidos duplos lamelares Biodiesel Transesterificação Termogravimetria Cromatografia Catalysts Hydroxides doubles layered Biodiesel Transesterification Thermogravimetry Chromatography CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA |
dc.subject.eng.fl_str_mv |
Catalysts Hydroxides doubles layered Biodiesel Transesterification Thermogravimetry Chromatography |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA |
description |
In this paper, the Layered Double Hydroxides (LDH s) type hydrotalcite were synthesized, characterized and tested as basic heterogeneous catalysts for the production of biodiesel by transesterification of sunflower oil with methanol. The synthesis of materials Layered Double Hydroxides (LDH s) by co-precipitation method from nitrates of magnesium and aluminum, and sodium carbonate. The materials were submitted to the variation in chemical composition, which is the amount of Mg2+ ions replaced by Al3+. This variation affects the characteristic physico-chemical and reaction the solid. The molar ratio varied in the range of 1:1 and 3:1 magnesium / aluminum, and their values between 0.2 and 0.33. This study aims to evaluate the influence of variation of molar ratio of mixed oxides derived from LDH s and the influence of impregnation of a material with catalytic activity, the KI, the rate of conversion of sunflower oil into methyl esters (biodiesel) through transesterification by heterogeneous catalysis. .The catalysts were calcined at 550 ° C and characterized by X-ray diffraction (XRD), scanning electron microscopy and energy dispersive spectroscopy of X-ray (SEM / EDS), thermogravimetric analysis (TG) and test basicity. The transesterification reaction was performed for reflux is a mixture of sunflower oil and methanol with a molar ratio of 15:1, a reaction time of 4h and a catalyst concentration of 2% by weight. The physical-chemical characterization of sunflower oil and biodiesel obtained by the route methyl submitted according NBR, EN, ASTM. Subsequently, it was with the chromatographic and thermogravimetric characterizations of oils. The results of chromatographic analysis showed that the catalysts were effective in converting vegetable oil into biodiesel, in particular the type hydrotalcite KI-HDL-R1, with a conversion of 99.2%, indicating the strong influence of the chemical composition of the material, in special due to presence of potassium in the structure of the catalyst |
publishDate |
2009 |
dc.date.issued.fl_str_mv |
2009-08-14 |
dc.date.available.fl_str_mv |
2010-03-23 2014-12-17T15:41:45Z |
dc.date.accessioned.fl_str_mv |
2014-12-17T15:41:45Z |
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.citation.fl_str_mv |
ALVES, Aline Araújo. Hidróxidos duplos lamelares aplicados à obtenção de biodiesel. 2009. 112 f. Dissertação (Mestrado em Físico-Química; Química) - Universidade Federal do Rio Grande do Norte, Natal, 2009. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufrn.br/jspui/handle/123456789/17606 |
identifier_str_mv |
ALVES, Aline Araújo. Hidróxidos duplos lamelares aplicados à obtenção de biodiesel. 2009. 112 f. Dissertação (Mestrado em Físico-Química; Química) - Universidade Federal do Rio Grande do Norte, Natal, 2009. |
url |
https://repositorio.ufrn.br/jspui/handle/123456789/17606 |
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por |
language |
por |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
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Universidade Federal do Rio Grande do Norte |
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Programa de Pós-Graduação em Química |
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UFRN |
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BR |
dc.publisher.department.fl_str_mv |
Físico-Química; Química |
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Universidade Federal do Rio Grande do Norte |
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reponame:Repositório Institucional da UFRN instname:Universidade Federal do Rio Grande do Norte (UFRN) instacron:UFRN |
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