Esterification of fatty acids to biodiesel over polymers with sulfonic acid groups

Detalhes bibliográficos
Autor(a) principal: Caetano, CS
Data de Publicação: 2009
Outros Autores: Guerreiro, L, Fonseca, I, Ramos, A, Vital, J, Castanheiro, JE
Tipo de documento: Artigo
Idioma: por
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10174/6070
https://doi.org/10.1016/j.apcata.2009.02.028
Resumo: The esterification of palmitic acid with methanol was studied using poly(vinyl alcohol) cross-linked with sulfosuccinic acid (SSA) and polystyrene cross-linked with divinylbenzene with sulfonic acid groups, as catalysts, at 60 ºC. It was observed that the PVAmatrixes with sulfonic acid groups were more active than the polystyrene ones. With the most active polymeric matrix (PVA_SSA40), an almost 90% equilibrium conversion was achieved after 2 h. Further, the optimisation of reaction parameters, such as, catalyst loading, molar ratio alcohol to fatty acid and type of alcohol was carried out with PVA_SSA40 catalyst. Catalytic stability of the PVA_SSA40 was evaluated by performing consecutive batch runs with the same catalyst sample. After the second batch, a stabilisation of the catalytic activity was observed. The PVA_SSA40 was also used as catalyst in the esterification of oleic and stearic acid with methanol,having been obtained an equilibrium conversion of almost 80%. In order to become the biodiesel totally biogenerated, the esterification of palmitic acid was carried out with ethanol, at 60 ºC and 80 ºC. It was observed that the reaction rate is slower when the reaction is carried out with methanol, at 60 ºC. In a posterior catalytic experiment at 60 ºC, PVA_SSA40 showed catalytic activity to obtain biodiesel from animal fats (lard), in the presence of methanol.
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spelling Esterification of fatty acids to biodiesel over polymers with sulfonic acid groupsBiodieselPVAPSSulfonic acid groupsEsterificationFree fatty acidsThe esterification of palmitic acid with methanol was studied using poly(vinyl alcohol) cross-linked with sulfosuccinic acid (SSA) and polystyrene cross-linked with divinylbenzene with sulfonic acid groups, as catalysts, at 60 ºC. It was observed that the PVAmatrixes with sulfonic acid groups were more active than the polystyrene ones. With the most active polymeric matrix (PVA_SSA40), an almost 90% equilibrium conversion was achieved after 2 h. Further, the optimisation of reaction parameters, such as, catalyst loading, molar ratio alcohol to fatty acid and type of alcohol was carried out with PVA_SSA40 catalyst. Catalytic stability of the PVA_SSA40 was evaluated by performing consecutive batch runs with the same catalyst sample. After the second batch, a stabilisation of the catalytic activity was observed. The PVA_SSA40 was also used as catalyst in the esterification of oleic and stearic acid with methanol,having been obtained an equilibrium conversion of almost 80%. In order to become the biodiesel totally biogenerated, the esterification of palmitic acid was carried out with ethanol, at 60 ºC and 80 ºC. It was observed that the reaction rate is slower when the reaction is carried out with methanol, at 60 ºC. In a posterior catalytic experiment at 60 ºC, PVA_SSA40 showed catalytic activity to obtain biodiesel from animal fats (lard), in the presence of methanol.Elsevier2012-11-28T11:23:26Z2012-11-282009-05-15T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/6070http://hdl.handle.net/10174/6070https://doi.org/10.1016/j.apcata.2009.02.028porApplied Catalysis A: General 359 (2009) 41–46Departamento de Químicandndndndndjefc@uevora.pt433Caetano, CSGuerreiro, LFonseca, IRamos, AVital, JCastanheiro, JEinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-03T18:45:24Zoai:dspace.uevora.pt:10174/6070Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:01:00.057190Repositório 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 Esterification of fatty acids to biodiesel over polymers with sulfonic acid groups
title Esterification of fatty acids to biodiesel over polymers with sulfonic acid groups
spellingShingle Esterification of fatty acids to biodiesel over polymers with sulfonic acid groups
Caetano, CS
Biodiesel
PVA
PS
Sulfonic acid groups
Esterification
Free fatty acids
title_short Esterification of fatty acids to biodiesel over polymers with sulfonic acid groups
title_full Esterification of fatty acids to biodiesel over polymers with sulfonic acid groups
title_fullStr Esterification of fatty acids to biodiesel over polymers with sulfonic acid groups
title_full_unstemmed Esterification of fatty acids to biodiesel over polymers with sulfonic acid groups
title_sort Esterification of fatty acids to biodiesel over polymers with sulfonic acid groups
author Caetano, CS
author_facet Caetano, CS
Guerreiro, L
Fonseca, I
Ramos, A
Vital, J
Castanheiro, JE
author_role author
author2 Guerreiro, L
Fonseca, I
Ramos, A
Vital, J
Castanheiro, JE
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Caetano, CS
Guerreiro, L
Fonseca, I
Ramos, A
Vital, J
Castanheiro, JE
dc.subject.por.fl_str_mv Biodiesel
PVA
PS
Sulfonic acid groups
Esterification
Free fatty acids
topic Biodiesel
PVA
PS
Sulfonic acid groups
Esterification
Free fatty acids
description The esterification of palmitic acid with methanol was studied using poly(vinyl alcohol) cross-linked with sulfosuccinic acid (SSA) and polystyrene cross-linked with divinylbenzene with sulfonic acid groups, as catalysts, at 60 ºC. It was observed that the PVAmatrixes with sulfonic acid groups were more active than the polystyrene ones. With the most active polymeric matrix (PVA_SSA40), an almost 90% equilibrium conversion was achieved after 2 h. Further, the optimisation of reaction parameters, such as, catalyst loading, molar ratio alcohol to fatty acid and type of alcohol was carried out with PVA_SSA40 catalyst. Catalytic stability of the PVA_SSA40 was evaluated by performing consecutive batch runs with the same catalyst sample. After the second batch, a stabilisation of the catalytic activity was observed. The PVA_SSA40 was also used as catalyst in the esterification of oleic and stearic acid with methanol,having been obtained an equilibrium conversion of almost 80%. In order to become the biodiesel totally biogenerated, the esterification of palmitic acid was carried out with ethanol, at 60 ºC and 80 ºC. It was observed that the reaction rate is slower when the reaction is carried out with methanol, at 60 ºC. In a posterior catalytic experiment at 60 ºC, PVA_SSA40 showed catalytic activity to obtain biodiesel from animal fats (lard), in the presence of methanol.
publishDate 2009
dc.date.none.fl_str_mv 2009-05-15T00:00:00Z
2012-11-28T11:23:26Z
2012-11-28
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/10174/6070
http://hdl.handle.net/10174/6070
https://doi.org/10.1016/j.apcata.2009.02.028
url http://hdl.handle.net/10174/6070
https://doi.org/10.1016/j.apcata.2009.02.028
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv Applied Catalysis A: General 359 (2009) 41–46
Departamento de Química
nd
nd
nd
nd
nd
jefc@uevora.pt
433
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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
instacron_str 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
repository.mail.fl_str_mv
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