Valorization of waste cooking oils through conversion processes into biodiesel catalyzed by [HMIM][HSO4]
Autor(a) principal: | |
---|---|
Data de Publicação: | 2020 |
Tipo de documento: | Dissertação |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10198/24724 |
Resumo: | Biodiesel is a renewable alternative to fossil diesel, produced from vegetable oils, animal fats and residual oils. In the present work, the influence of the application of the ionic liquid 1-methylimidazolium hydrogen sulfate [HMIM]HSO4 in the catalysis of transesterification/esterification reactions in a simulated acidic oil, obtained through the incorporation of oleic acid in a waste cooking oil, was studied at 65 °C. The effect of the selected parameters: reaction time (2 h, 4 h and 8 h), catalyst dosage (5 % wt, 10 % wt and 15 % wt), molar ratio oil: methanol (1:5, 1:15 and 1:20) and mass percentage of incorporation of oleic acid (20%, 40% and 60%) was studied using a Response Surface Methodology (RSM) from an experimental design based on a Box-Behnken 34. Three responses were evaluated: the conversion in terms of reduction of the acidity of the simulated oil (R1), the Fatty Acid Methyl Esters (FAME) mass content of the biodiesel produced (R2) and the yield in terms of mass of FAME obtained at the end of reaction in relation to the initial mass of the simulated oil (R3). In the analysis of the experimental results obtained, it is concluded that for all responses, the least relevant factor is the catalyst dosage, while the other factors are significant for the model. The most favorable reaction conditions for the conversion response in terms of acidity reduction correspond to a reaction time of 6 h, catalyst dosage of 5% wt, molar ratio oil/methanol 1:20, incorporation of 20% oleic acid, temperature of 65 ºC, with an average conversion of 76.70%. The most favorable reaction conditions for the FAME content and yield response are similar, corresponding to a reaction time of 6h, catalyst dosage 5% wt, oil/methanol molar ratio of 1:20, incorporation of 60% oleic acid and temperature of 65 ºC, with an average conversion of 42.52% and 37.70%, respectively. Additionally, the recovery and reuse of the ionic liquid was studied in two reaction cycles, at the optimum conditions corresponding to FAME content and Yield, already mentioned. The reaction conversion in terms of acidity reduction, FAME content and Yield remained practically constant during the two cycles. In terms of acidity reduction, it was obtained for the first cycle, 69.81% and for the second cycle, 69.39%. FAME content of 42.44% was obtained for the first cycle and 42.60% for the second cycle. Finally, the yield in the first cycle was 35.91% and for the second, a value of 39.50% was obtained. The achieved results indicate that, for the selected operational conditions, IL promotes only the esterification reaction. Thus, the possibility of using this IL to treat oils with high acidity values is viable, and subsequently a transesterification reaction with basic catalysts can be carried out. |
id |
RCAP_20e98722dee014c29321222cff29f40c |
---|---|
oai_identifier_str |
oai:bibliotecadigital.ipb.pt:10198/24724 |
network_acronym_str |
RCAP |
network_name_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository_id_str |
7160 |
spelling |
Valorization of waste cooking oils through conversion processes into biodiesel catalyzed by [HMIM][HSO4]Waste cooking oilsEsterificationResponse Surface Methodology (RSM)Ionic liquidsDomínio/Área Científica::Engenharia e Tecnologia::Engenharia do AmbienteBiodiesel is a renewable alternative to fossil diesel, produced from vegetable oils, animal fats and residual oils. In the present work, the influence of the application of the ionic liquid 1-methylimidazolium hydrogen sulfate [HMIM]HSO4 in the catalysis of transesterification/esterification reactions in a simulated acidic oil, obtained through the incorporation of oleic acid in a waste cooking oil, was studied at 65 °C. The effect of the selected parameters: reaction time (2 h, 4 h and 8 h), catalyst dosage (5 % wt, 10 % wt and 15 % wt), molar ratio oil: methanol (1:5, 1:15 and 1:20) and mass percentage of incorporation of oleic acid (20%, 40% and 60%) was studied using a Response Surface Methodology (RSM) from an experimental design based on a Box-Behnken 34. Three responses were evaluated: the conversion in terms of reduction of the acidity of the simulated oil (R1), the Fatty Acid Methyl Esters (FAME) mass content of the biodiesel produced (R2) and the yield in terms of mass of FAME obtained at the end of reaction in relation to the initial mass of the simulated oil (R3). In the analysis of the experimental results obtained, it is concluded that for all responses, the least relevant factor is the catalyst dosage, while the other factors are significant for the model. The most favorable reaction conditions for the conversion response in terms of acidity reduction correspond to a reaction time of 6 h, catalyst dosage of 5% wt, molar ratio oil/methanol 1:20, incorporation of 20% oleic acid, temperature of 65 ºC, with an average conversion of 76.70%. The most favorable reaction conditions for the FAME content and yield response are similar, corresponding to a reaction time of 6h, catalyst dosage 5% wt, oil/methanol molar ratio of 1:20, incorporation of 60% oleic acid and temperature of 65 ºC, with an average conversion of 42.52% and 37.70%, respectively. Additionally, the recovery and reuse of the ionic liquid was studied in two reaction cycles, at the optimum conditions corresponding to FAME content and Yield, already mentioned. The reaction conversion in terms of acidity reduction, FAME content and Yield remained practically constant during the two cycles. In terms of acidity reduction, it was obtained for the first cycle, 69.81% and for the second cycle, 69.39%. FAME content of 42.44% was obtained for the first cycle and 42.60% for the second cycle. Finally, the yield in the first cycle was 35.91% and for the second, a value of 39.50% was obtained. The achieved results indicate that, for the selected operational conditions, IL promotes only the esterification reaction. Thus, the possibility of using this IL to treat oils with high acidity values is viable, and subsequently a transesterification reaction with basic catalysts can be carried out.O biodiesel é uma alternativa renovável ao diesel fóssil, produzido através de óleos vegetais, gorduras animais e óleos residuais. No presente trabalho, estudou-se a influência da aplicação do líquido iónico 1-metilimidazólio hidrogenossulfato, [HMIM]HSO4, na catálise de reações de transesterificação/esterificação num óleo ácido simulado através da incorporação de ácido oleico num óleo alimentar usado. A influência dos parâmetros: tempo de reação (2 h, 4 h e 8 h), dosagem de catalisador (5 % m/m, 10 % m/m e 15 % m/m), razão molar óleo: metanol (1:5, 1:15 e 1:20) e percentagem mássica de incorporação de ácido oleico (20 %, 40 % e 60 %) foi estudada utilizando uma Metodologia de Superfície de Resposta (RSM) a partir de um planeamento experimental baseado num Box-Behnken 34, mantendo uma temperatura de 65 °C. A conversão em termos de redução da acidez do óleo simulado (R1), o conteúdo mássico em FAME do biodiesel produzido (R2) e o rendimento em termos de massa de FAME obtido no final da reação em relação ao inicialmente presente no óleo simulado (R3) foram as três respostas estudadas. Na análise dos resultados experimentais obtidos, conclui-se que para todas as respostas, o fator menos relevante é a dosagem de catalisador, enquanto os outros fatores são significativos para o modelo. As condições reacionais mais favoráveis para a resposta conversão em termos de redução de acidez correspondem a um tempo de reação de 6 h, dosagem de catalisador de 5 % (m/m), razão molar óleo/metanol 1:20, incorporação de ácido oleico de 20 %, temperatura de 65 ºC, com uma conversão média de 76,70 %. As condições reacionais mais favoráveis para a resposta conteúdo em FAME e do rendimento são semelhantes, correspondendo a um tempo de reação de 6 h, dosagem catalisador 5 % (m/m), razão molar óleo/metanol de 1:20, incorporação de ácido oleico de 60 % e temperatura de 65 ºC, com uma conversão média de 42,52 % e 37,70 %, respetivamente. Adicionalmente, a recuperação e reutilização do líquido iónico foi estudada em dois ciclos, para as condições dos pontos ótimos do FAME e do rendimento, já referidos. Obteve-se uma taxa de conversão em termos de redução de acidez, de FAME e de Rendimento, praticamente constante durante os dois ciclos. Em termos de redução de acidez obteve-se para o primeiro ciclo, 69,81 % e para o segundo 69,39 %, enquanto para o conteúdo em FAME, obteve-se para o primeiro 42,44 % e para o segundo 42,60 %, e para o rendimento no primeiro ciclo obteve-se 35,91 % e para o segundo 39,50 %. Os resultados obtidos indicam que, para as condições operacionais selecionadas, o IL promove apenas a reação de esterificação. Assim, pode ser considerada a possibilidade de usar esse IL para tratar óleos com alto valor de acidez, e posteriormente realizar uma reação de transesterificação com catalisadores básicos.Queiroz, AnaRibeiro, António E.Brito, PauloBiblioteca Digital do IPBMonteiro, Fábio2022-01-19T10:02:23Z202120202021-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10198/24724TID:202886999enginfo: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:RCAAP2023-11-21T10:55:45Zoai:bibliotecadigital.ipb.pt:10198/24724Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T23:15:40.520584Repositório 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 |
Valorization of waste cooking oils through conversion processes into biodiesel catalyzed by [HMIM][HSO4] |
title |
Valorization of waste cooking oils through conversion processes into biodiesel catalyzed by [HMIM][HSO4] |
spellingShingle |
Valorization of waste cooking oils through conversion processes into biodiesel catalyzed by [HMIM][HSO4] Monteiro, Fábio Waste cooking oils Esterification Response Surface Methodology (RSM) Ionic liquids Domínio/Área Científica::Engenharia e Tecnologia::Engenharia do Ambiente |
title_short |
Valorization of waste cooking oils through conversion processes into biodiesel catalyzed by [HMIM][HSO4] |
title_full |
Valorization of waste cooking oils through conversion processes into biodiesel catalyzed by [HMIM][HSO4] |
title_fullStr |
Valorization of waste cooking oils through conversion processes into biodiesel catalyzed by [HMIM][HSO4] |
title_full_unstemmed |
Valorization of waste cooking oils through conversion processes into biodiesel catalyzed by [HMIM][HSO4] |
title_sort |
Valorization of waste cooking oils through conversion processes into biodiesel catalyzed by [HMIM][HSO4] |
author |
Monteiro, Fábio |
author_facet |
Monteiro, Fábio |
author_role |
author |
dc.contributor.none.fl_str_mv |
Queiroz, Ana Ribeiro, António E. Brito, Paulo Biblioteca Digital do IPB |
dc.contributor.author.fl_str_mv |
Monteiro, Fábio |
dc.subject.por.fl_str_mv |
Waste cooking oils Esterification Response Surface Methodology (RSM) Ionic liquids Domínio/Área Científica::Engenharia e Tecnologia::Engenharia do Ambiente |
topic |
Waste cooking oils Esterification Response Surface Methodology (RSM) Ionic liquids Domínio/Área Científica::Engenharia e Tecnologia::Engenharia do Ambiente |
description |
Biodiesel is a renewable alternative to fossil diesel, produced from vegetable oils, animal fats and residual oils. In the present work, the influence of the application of the ionic liquid 1-methylimidazolium hydrogen sulfate [HMIM]HSO4 in the catalysis of transesterification/esterification reactions in a simulated acidic oil, obtained through the incorporation of oleic acid in a waste cooking oil, was studied at 65 °C. The effect of the selected parameters: reaction time (2 h, 4 h and 8 h), catalyst dosage (5 % wt, 10 % wt and 15 % wt), molar ratio oil: methanol (1:5, 1:15 and 1:20) and mass percentage of incorporation of oleic acid (20%, 40% and 60%) was studied using a Response Surface Methodology (RSM) from an experimental design based on a Box-Behnken 34. Three responses were evaluated: the conversion in terms of reduction of the acidity of the simulated oil (R1), the Fatty Acid Methyl Esters (FAME) mass content of the biodiesel produced (R2) and the yield in terms of mass of FAME obtained at the end of reaction in relation to the initial mass of the simulated oil (R3). In the analysis of the experimental results obtained, it is concluded that for all responses, the least relevant factor is the catalyst dosage, while the other factors are significant for the model. The most favorable reaction conditions for the conversion response in terms of acidity reduction correspond to a reaction time of 6 h, catalyst dosage of 5% wt, molar ratio oil/methanol 1:20, incorporation of 20% oleic acid, temperature of 65 ºC, with an average conversion of 76.70%. The most favorable reaction conditions for the FAME content and yield response are similar, corresponding to a reaction time of 6h, catalyst dosage 5% wt, oil/methanol molar ratio of 1:20, incorporation of 60% oleic acid and temperature of 65 ºC, with an average conversion of 42.52% and 37.70%, respectively. Additionally, the recovery and reuse of the ionic liquid was studied in two reaction cycles, at the optimum conditions corresponding to FAME content and Yield, already mentioned. The reaction conversion in terms of acidity reduction, FAME content and Yield remained practically constant during the two cycles. In terms of acidity reduction, it was obtained for the first cycle, 69.81% and for the second cycle, 69.39%. FAME content of 42.44% was obtained for the first cycle and 42.60% for the second cycle. Finally, the yield in the first cycle was 35.91% and for the second, a value of 39.50% was obtained. The achieved results indicate that, for the selected operational conditions, IL promotes only the esterification reaction. Thus, the possibility of using this IL to treat oils with high acidity values is viable, and subsequently a transesterification reaction with basic catalysts can be carried out. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020 2021 2021-01-01T00:00:00Z 2022-01-19T10:02:23Z |
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://hdl.handle.net/10198/24724 TID:202886999 |
url |
http://hdl.handle.net/10198/24724 |
identifier_str_mv |
TID:202886999 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
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 |
|
_version_ |
1799135439725002752 |