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Biodiesel production from waste frying oils over lime catalysts

Bibliographic Details
Main Author: Puna, Jaime
Publication Date: 2013
Other Authors: Correia, Maria Joana Neiva, Dias, Ana Paula Soares, Gomes, João, Bordado, João
Format: Article
Language: eng
Source: Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
Download full: http://hdl.handle.net/10400.21/2840
Summary: Biodiesel production from semi-refined oils (SRO) and waste frying oils (WFO) was studied using commercial CaO as heterogeneous catalyst. The methanolysis tests were carried out in mild reaction conditions (62 A degrees C, atmospheric pressure). With such conditions, SRO (soybean and rapeseed) allowed to produce a biodiesel containing 97-98 % of methyl esters (FAME), whereas WFO only provided 86-87 % of FAME. The lower FAME yield for WFO oil is ascribable to the partial neutralization of the catalyst by free fatty acids. Also, soaps formation from the WFO oil reduced the weight yield of the oil phase (containing FAME) obtained and increased the MONG content of the glycerin phase. The catalysts stability tests showed high stability even when WFO oil was processed. Catalytic tests performed with blends of WFO/semi-refined oils showed blending as a good strategy to process low value raw oils with minor decay of the catalyst performance. Both WFO and semi-refined oils showed S-shape kinetics curves thus discarding significant differences of the reaction mechanisms.
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spelling Biodiesel production from waste frying oils over lime catalystsBiodieselWaste frying oilsCaO catalystOil acidityS-shape kineticsNear-Infrared SpectroscopyHeterogeneous CatalystsSoybean OilCalcium-OxideCooking OilSolid BaseTransesterificationHydrotalcitesQualityModelsBiodiesel production from semi-refined oils (SRO) and waste frying oils (WFO) was studied using commercial CaO as heterogeneous catalyst. The methanolysis tests were carried out in mild reaction conditions (62 A degrees C, atmospheric pressure). With such conditions, SRO (soybean and rapeseed) allowed to produce a biodiesel containing 97-98 % of methyl esters (FAME), whereas WFO only provided 86-87 % of FAME. The lower FAME yield for WFO oil is ascribable to the partial neutralization of the catalyst by free fatty acids. Also, soaps formation from the WFO oil reduced the weight yield of the oil phase (containing FAME) obtained and increased the MONG content of the glycerin phase. The catalysts stability tests showed high stability even when WFO oil was processed. Catalytic tests performed with blends of WFO/semi-refined oils showed blending as a good strategy to process low value raw oils with minor decay of the catalyst performance. Both WFO and semi-refined oils showed S-shape kinetics curves thus discarding significant differences of the reaction mechanisms.SpringerRCIPLPuna, JaimeCorreia, Maria Joana NeivaDias, Ana Paula SoaresGomes, JoãoBordado, João2013-11-01T15:31:36Z2013-082013-08-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfapplication/pdfhttp://hdl.handle.net/10400.21/2840eng1878-519010.1007/s11144-013-0557-2info:eu-repo/semantics/openAccessreponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiainstacron:RCAAP2025-02-12T08:46:16Zoai:repositorio.ipl.pt:10400.21/2840Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireinfo@rcaap.ptopendoar:https://opendoar.ac.uk/repository/71602025-05-28T19:57:15.776895Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiafalse
dc.title.none.fl_str_mv Biodiesel production from waste frying oils over lime catalysts
title Biodiesel production from waste frying oils over lime catalysts
spellingShingle Biodiesel production from waste frying oils over lime catalysts
Puna, Jaime
Biodiesel
Waste frying oils
CaO catalyst
Oil acidity
S-shape kinetics
Near-Infrared Spectroscopy
Heterogeneous Catalysts
Soybean Oil
Calcium-Oxide
Cooking Oil
Solid Base
Transesterification
Hydrotalcites
Quality
Models
title_short Biodiesel production from waste frying oils over lime catalysts
title_full Biodiesel production from waste frying oils over lime catalysts
title_fullStr Biodiesel production from waste frying oils over lime catalysts
title_full_unstemmed Biodiesel production from waste frying oils over lime catalysts
title_sort Biodiesel production from waste frying oils over lime catalysts
author Puna, Jaime
author_facet Puna, Jaime
Correia, Maria Joana Neiva
Dias, Ana Paula Soares
Gomes, João
Bordado, João
author_role author
author2 Correia, Maria Joana Neiva
Dias, Ana Paula Soares
Gomes, João
Bordado, João
author2_role author
author
author
author
dc.contributor.none.fl_str_mv RCIPL
dc.contributor.author.fl_str_mv Puna, Jaime
Correia, Maria Joana Neiva
Dias, Ana Paula Soares
Gomes, João
Bordado, João
dc.subject.por.fl_str_mv Biodiesel
Waste frying oils
CaO catalyst
Oil acidity
S-shape kinetics
Near-Infrared Spectroscopy
Heterogeneous Catalysts
Soybean Oil
Calcium-Oxide
Cooking Oil
Solid Base
Transesterification
Hydrotalcites
Quality
Models
topic Biodiesel
Waste frying oils
CaO catalyst
Oil acidity
S-shape kinetics
Near-Infrared Spectroscopy
Heterogeneous Catalysts
Soybean Oil
Calcium-Oxide
Cooking Oil
Solid Base
Transesterification
Hydrotalcites
Quality
Models
description Biodiesel production from semi-refined oils (SRO) and waste frying oils (WFO) was studied using commercial CaO as heterogeneous catalyst. The methanolysis tests were carried out in mild reaction conditions (62 A degrees C, atmospheric pressure). With such conditions, SRO (soybean and rapeseed) allowed to produce a biodiesel containing 97-98 % of methyl esters (FAME), whereas WFO only provided 86-87 % of FAME. The lower FAME yield for WFO oil is ascribable to the partial neutralization of the catalyst by free fatty acids. Also, soaps formation from the WFO oil reduced the weight yield of the oil phase (containing FAME) obtained and increased the MONG content of the glycerin phase. The catalysts stability tests showed high stability even when WFO oil was processed. Catalytic tests performed with blends of WFO/semi-refined oils showed blending as a good strategy to process low value raw oils with minor decay of the catalyst performance. Both WFO and semi-refined oils showed S-shape kinetics curves thus discarding significant differences of the reaction mechanisms.
publishDate 2013
dc.date.none.fl_str_mv 2013-11-01T15:31:36Z
2013-08
2013-08-01T00:00:00Z
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/10400.21/2840
url http://hdl.handle.net/10400.21/2840
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 1878-5190
10.1007/s11144-013-0557-2
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv reponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron:RCAAP
instname_str FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron_str RCAAP
institution RCAAP
reponame_str Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
collection Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
repository.name.fl_str_mv Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
repository.mail.fl_str_mv info@rcaap.pt
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