Solvent assisted biodiesel production by co-processing beef tallow and soybean oil over calcium catalysts
Autor(a) principal: | |
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Data de Publicação: | 2019 |
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/10400.21/10842 |
Resumo: | Due to sustainability issues, biodiesel must be produced from low-grade fats and the conventional homogeneously-catalyzed processes must be replaced by more efficient and more profitable production processes such as heterogeneous ones. Biodiesel (fatty acids methyl esters, FAME) was produced from a mixture (50 wt%) of soybean oil and non-edible beef tallow over heterogeneous calcium-based catalysts obtained by calcination of scallop shells. In order to improve the catalytic performances, solvent assisted methanolysis was conducted using alcohols (ethanol, 1-propanol, isopropanol and isobutanol), acetone, methylcyclohexane, and tetrahydrofuran (THF) with Vmethanol/Vsolvent = 2.8. Catalytic data revealed that alcohol solvents adsorb competitively with methanol on the catalyst active sites reducing the FAME yield due to their slower alcoholysis rates. Hexane and methylcyclohexane are inadequate for methanolysis reactions since they are immiscible with methanol. THF and acetone are immiscible with the co-produced glycerin, which favors methyl esters formation by displacing the chemical equilibrium towards reaction products. Acetone performs better than THF (FAME yield gain of 14% against 3%) because of its higher miscibility with methanol. THF was the most effective solvent to avoid fat adsorption on the catalyst surface, a key factor for catalyst stability, and to improve the glycerin purity. |
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Solvent assisted biodiesel production by co-processing beef tallow and soybean oil over calcium catalystsBiodieselSustainabilityLow grade fatsCalcium catalystSolventsGlycerin purityDue to sustainability issues, biodiesel must be produced from low-grade fats and the conventional homogeneously-catalyzed processes must be replaced by more efficient and more profitable production processes such as heterogeneous ones. Biodiesel (fatty acids methyl esters, FAME) was produced from a mixture (50 wt%) of soybean oil and non-edible beef tallow over heterogeneous calcium-based catalysts obtained by calcination of scallop shells. In order to improve the catalytic performances, solvent assisted methanolysis was conducted using alcohols (ethanol, 1-propanol, isopropanol and isobutanol), acetone, methylcyclohexane, and tetrahydrofuran (THF) with Vmethanol/Vsolvent = 2.8. Catalytic data revealed that alcohol solvents adsorb competitively with methanol on the catalyst active sites reducing the FAME yield due to their slower alcoholysis rates. Hexane and methylcyclohexane are inadequate for methanolysis reactions since they are immiscible with methanol. THF and acetone are immiscible with the co-produced glycerin, which favors methyl esters formation by displacing the chemical equilibrium towards reaction products. Acetone performs better than THF (FAME yield gain of 14% against 3%) because of its higher miscibility with methanol. THF was the most effective solvent to avoid fat adsorption on the catalyst surface, a key factor for catalyst stability, and to improve the glycerin purity.SpringerRCIPLDias, Ana Paula SoaresRamos, MartaCatarino, Mónica InêsPuna, JaimeGomes, João2019-12-12T11:49:06Z2020-112020-11-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.21/10842engDIAS, Ana Paula Soares; [et al] – Solvent assisted biodiesel production by co-processing beef tallow and soybean oil over calcium catalysts. Waste and Biomass Valorization. ISSN 1877-2641. Vol. 11, N.º 11 (2020), pp. 6249-62591877-2641https://doi.org/10.1007/s12649-019-00903-7metadata only accessinfo: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:RCAAP2023-08-03T10:01:20Zoai:repositorio.ipl.pt:10400.21/10842Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:19:10.866139Repositório 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 |
Solvent assisted biodiesel production by co-processing beef tallow and soybean oil over calcium catalysts |
title |
Solvent assisted biodiesel production by co-processing beef tallow and soybean oil over calcium catalysts |
spellingShingle |
Solvent assisted biodiesel production by co-processing beef tallow and soybean oil over calcium catalysts Dias, Ana Paula Soares Biodiesel Sustainability Low grade fats Calcium catalyst Solvents Glycerin purity |
title_short |
Solvent assisted biodiesel production by co-processing beef tallow and soybean oil over calcium catalysts |
title_full |
Solvent assisted biodiesel production by co-processing beef tallow and soybean oil over calcium catalysts |
title_fullStr |
Solvent assisted biodiesel production by co-processing beef tallow and soybean oil over calcium catalysts |
title_full_unstemmed |
Solvent assisted biodiesel production by co-processing beef tallow and soybean oil over calcium catalysts |
title_sort |
Solvent assisted biodiesel production by co-processing beef tallow and soybean oil over calcium catalysts |
author |
Dias, Ana Paula Soares |
author_facet |
Dias, Ana Paula Soares Ramos, Marta Catarino, Mónica Inês Puna, Jaime Gomes, João |
author_role |
author |
author2 |
Ramos, Marta Catarino, Mónica Inês Puna, Jaime Gomes, João |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
RCIPL |
dc.contributor.author.fl_str_mv |
Dias, Ana Paula Soares Ramos, Marta Catarino, Mónica Inês Puna, Jaime Gomes, João |
dc.subject.por.fl_str_mv |
Biodiesel Sustainability Low grade fats Calcium catalyst Solvents Glycerin purity |
topic |
Biodiesel Sustainability Low grade fats Calcium catalyst Solvents Glycerin purity |
description |
Due to sustainability issues, biodiesel must be produced from low-grade fats and the conventional homogeneously-catalyzed processes must be replaced by more efficient and more profitable production processes such as heterogeneous ones. Biodiesel (fatty acids methyl esters, FAME) was produced from a mixture (50 wt%) of soybean oil and non-edible beef tallow over heterogeneous calcium-based catalysts obtained by calcination of scallop shells. In order to improve the catalytic performances, solvent assisted methanolysis was conducted using alcohols (ethanol, 1-propanol, isopropanol and isobutanol), acetone, methylcyclohexane, and tetrahydrofuran (THF) with Vmethanol/Vsolvent = 2.8. Catalytic data revealed that alcohol solvents adsorb competitively with methanol on the catalyst active sites reducing the FAME yield due to their slower alcoholysis rates. Hexane and methylcyclohexane are inadequate for methanolysis reactions since they are immiscible with methanol. THF and acetone are immiscible with the co-produced glycerin, which favors methyl esters formation by displacing the chemical equilibrium towards reaction products. Acetone performs better than THF (FAME yield gain of 14% against 3%) because of its higher miscibility with methanol. THF was the most effective solvent to avoid fat adsorption on the catalyst surface, a key factor for catalyst stability, and to improve the glycerin purity. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-12-12T11:49:06Z 2020-11 2020-11-01T00:00:00Z |
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/10400.21/10842 |
url |
http://hdl.handle.net/10400.21/10842 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
DIAS, Ana Paula Soares; [et al] – Solvent assisted biodiesel production by co-processing beef tallow and soybean oil over calcium catalysts. Waste and Biomass Valorization. ISSN 1877-2641. Vol. 11, N.º 11 (2020), pp. 6249-6259 1877-2641 https://doi.org/10.1007/s12649-019-00903-7 |
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metadata only access info:eu-repo/semantics/openAccess |
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metadata only access |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Springer |
publisher.none.fl_str_mv |
Springer |
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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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