Rape oil transesterification over heterogeneous catalysts
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/20.500.12207/501 |
Resumo: | This work studies the application of KNO3/CaO catalyst in the transesterification reaction of triglycerides with methanol. The objective of the work was characterizing the methyl esters for its use as biodiesel in compression ignition motors. The variables affecting the methyl ester yield during the transesterification reaction, such as, amount of KNO3 impregnated in CaO, the total catalyst content, reaction temperature, agitation rate, and the methanol/oil molar ratio, were investigated to optimize the reaction conditions. The evolution of the process was followed by gas chromatography, determining the concentration of the methyl esters at different reaction times. The biodiesel was characterized by its density, viscosity, cetane index, saponification value, iodine value, acidity index, CFPP (cold filter plugging point), flash point and combustion point, according to ISO norms. The results showed that calcium oxide, impregnated with KNO3, have a strong basicity and high catalytic activity as a heterogeneous solid base catalyst. The biodiesel with the best properties was obtained using an amount of KNO3 of 10% impregnated in CaO, a methanol/oil molar ratio of 6:1, a reaction temperature of 65 °C, a reaction time of 3.0 h, and a catalyst total content of 1.0%. In these conditions, the oil conversion was 98% and the final product obtained had very similar characteristics to a no. 2 diesel, and therefore, these methyl esters might be used as an alternative to fossil fuels. |
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Rape oil transesterification over heterogeneous catalystsTransesterificationRape oilHeterogeneous catalystKNO3/CaO catalystMethanolysisBiodiesel characterizationThis work studies the application of KNO3/CaO catalyst in the transesterification reaction of triglycerides with methanol. The objective of the work was characterizing the methyl esters for its use as biodiesel in compression ignition motors. The variables affecting the methyl ester yield during the transesterification reaction, such as, amount of KNO3 impregnated in CaO, the total catalyst content, reaction temperature, agitation rate, and the methanol/oil molar ratio, were investigated to optimize the reaction conditions. The evolution of the process was followed by gas chromatography, determining the concentration of the methyl esters at different reaction times. The biodiesel was characterized by its density, viscosity, cetane index, saponification value, iodine value, acidity index, CFPP (cold filter plugging point), flash point and combustion point, according to ISO norms. The results showed that calcium oxide, impregnated with KNO3, have a strong basicity and high catalytic activity as a heterogeneous solid base catalyst. The biodiesel with the best properties was obtained using an amount of KNO3 of 10% impregnated in CaO, a methanol/oil molar ratio of 6:1, a reaction temperature of 65 °C, a reaction time of 3.0 h, and a catalyst total content of 1.0%. In these conditions, the oil conversion was 98% and the final product obtained had very similar characteristics to a no. 2 diesel, and therefore, these methyl esters might be used as an alternative to fossil fuels.2013-10-16T14:43:31Z2013-10-16T00:00:00Z2010-11-01T00:00:00Z2010-11-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/20.500.12207/501engmetadata only accessinfo:eu-repo/semantics/openAccessEncinar, J.González, J.Pardal, AnaMartínez, G.reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-06-23T07:46:26Zoai:repositorio.ipbeja.pt:20.500.12207/501Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T14:58:13.536056Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Rape oil transesterification over heterogeneous catalysts |
title |
Rape oil transesterification over heterogeneous catalysts |
spellingShingle |
Rape oil transesterification over heterogeneous catalysts Encinar, J. Transesterification Rape oil Heterogeneous catalyst KNO3/CaO catalyst Methanolysis Biodiesel characterization |
title_short |
Rape oil transesterification over heterogeneous catalysts |
title_full |
Rape oil transesterification over heterogeneous catalysts |
title_fullStr |
Rape oil transesterification over heterogeneous catalysts |
title_full_unstemmed |
Rape oil transesterification over heterogeneous catalysts |
title_sort |
Rape oil transesterification over heterogeneous catalysts |
author |
Encinar, J. |
author_facet |
Encinar, J. González, J. Pardal, Ana Martínez, G. |
author_role |
author |
author2 |
González, J. Pardal, Ana Martínez, G. |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Encinar, J. González, J. Pardal, Ana Martínez, G. |
dc.subject.por.fl_str_mv |
Transesterification Rape oil Heterogeneous catalyst KNO3/CaO catalyst Methanolysis Biodiesel characterization |
topic |
Transesterification Rape oil Heterogeneous catalyst KNO3/CaO catalyst Methanolysis Biodiesel characterization |
description |
This work studies the application of KNO3/CaO catalyst in the transesterification reaction of triglycerides with methanol. The objective of the work was characterizing the methyl esters for its use as biodiesel in compression ignition motors. The variables affecting the methyl ester yield during the transesterification reaction, such as, amount of KNO3 impregnated in CaO, the total catalyst content, reaction temperature, agitation rate, and the methanol/oil molar ratio, were investigated to optimize the reaction conditions. The evolution of the process was followed by gas chromatography, determining the concentration of the methyl esters at different reaction times. The biodiesel was characterized by its density, viscosity, cetane index, saponification value, iodine value, acidity index, CFPP (cold filter plugging point), flash point and combustion point, according to ISO norms. The results showed that calcium oxide, impregnated with KNO3, have a strong basicity and high catalytic activity as a heterogeneous solid base catalyst. The biodiesel with the best properties was obtained using an amount of KNO3 of 10% impregnated in CaO, a methanol/oil molar ratio of 6:1, a reaction temperature of 65 °C, a reaction time of 3.0 h, and a catalyst total content of 1.0%. In these conditions, the oil conversion was 98% and the final product obtained had very similar characteristics to a no. 2 diesel, and therefore, these methyl esters might be used as an alternative to fossil fuels. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-11-01T00:00:00Z 2010-11-01T00:00:00Z 2013-10-16T14:43:31Z 2013-10-16T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/20.500.12207/501 |
url |
http://hdl.handle.net/20.500.12207/501 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
metadata only access info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
metadata only access |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799129855991742464 |