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Optimization of biodiesel production through esterification catalysed by an acidic ionic liquid

2016Conference object Open access
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dc.contributor.authorYordanova, Steliyana T.
dc.contributor.authorQueiroz, Ana
dc.contributor.authorRibeiro, António E.
dc.contributor.authorBrito, Paulo
dc.date.accessioned2018-02-21T15:02:20Z
dc.date.available2018-02-21T15:02:20Z
dc.date.issued2016
dc.description.abstractRecently, there is an increasing interest in the development of alternative technologies to the oil economy, based on renewable energy sources. A possible solution is a biofuel for compression-ignition or diesel engines, obtained from fat-rich biomass. Therefore, a wide variety of raw materials can be used for the production of biodiesel, ranging from waste oils to edible commercial oils. Biodiesel is chemically composed by a mix of fatty acid methyl esters (FAME’s), and it is usually produced by transesterification of triglycerides, from vegetable oils and animal fats, in the presence of homogeneous or heterogeneous catalysts. However, alkali catalysts which provide high yields for the production of biodiesel in relatively mild conditions require previous neutralization of the oils. In fact, the use of high acidic raw materials may introduce operational problems, especially when resorting to second generation triglyceride sources. This type of raw materials, like waste cooking oils, do not compete with the food market, but usually feature high levels of free fatty acids (FFA’s), which may introduce complications in the classic production process of biodiesel, through alkaline transesterification. Thus, these problems can be partially prevented by the use of alternative acidic or basic catalysts, such as ionic liquids (IL’s) that also mediate esterification reactions of FFA’s to FAME’s. An increased interest in the application of IL’s in multiple fields has been observed lately, mainly as solvents and catalysts to a wide variety of reaction and/or separation systems. In this work, it is presented a study of the performance of the acidic IL, 1-butyl-3-methylimidazolium hydrogen sulfate ([BMIM]HSO4), as a catalyst for the esterification of a mix of fatty acids (mostly oleic acid) to the respective FAME’s, using methanol. Multiple reaction batches were designed varying several operational parameters: temperature, reaction time, oleic acid/methanol mole ratio and mass of catalyst, in order to optimize the reaction yield. The prediction of the reaction yield was done using two indirect methods: measuring the final product acidic value through volumetric titration and assessing the total FAME content of the biodiesel product by Gas Chromatography (GC-FID). The GC-FID analysis made possible the identification and quantification of the several FAME’s present in the produced biodiesel. Using the conditions described above the reaction yields reach values as high as 90%, and the total weight content of identified FAME’s in the biodiesel product is 95-98%. Thus, it is concluded that the ionic liquid [BMIM]HSO4 proves to be a promising catalyst for esterification reactions, and a potential alternative for biodiesel production.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationYordanova, S.T., Queiroz, A.M., Ribeiro, A., Brito, P.; (2016). Optimization of biodiesel production through esterification catalysed by an acidic ionic liquid. XXII Encontro Luso-Galego de Química. Bragança: Instituto Politécnico. ISBN 978-989-8124-17-3pt_PT
dc.identifier.issn978-989-8124-17-3
dc.identifier.urihttp://hdl.handle.net/10198/15887
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherInstituto Politécnico de Bragançapt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.titleOptimization of biodiesel production through esterification catalysed by an acidic ionic liquidpt_PT
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferencePlaceBragançapt_PT
oaire.citation.titleXXII Encontro Luso-Galego de Químicapt_PT
person.familyNameQueiroz
person.familyNameRibeiro
person.familyNameBrito
person.givenNameAna
person.givenNameAntónio E.
person.givenNamePaulo
person.identifier.ciencia-id2611-D40C-3472
person.identifier.ciencia-id3211-D5B0-870D
person.identifier.ciencia-idA31A-D845-A6E2
person.identifier.orcid0000-0003-4761-0618
person.identifier.orcid0000-0003-4569-7887
person.identifier.orcid0000-0003-1805-0252
person.identifier.ridO-8367-2015
person.identifier.scopus-author-id23390701300
person.identifier.scopus-author-id31168231800
rcaap.rightsopenAccesspt_PT
rcaap.typeconferenceObjectpt_PT
relation.isAuthorOfPublication508436a2-5db1-481e-9c48-eab160333d61
relation.isAuthorOfPublication52666376-f100-4407-87ef-dc5df3613761
relation.isAuthorOfPublication0370deac-dc4e-4b3d-8e1f-fc2d117794d2
relation.isAuthorOfPublication.latestForDiscovery508436a2-5db1-481e-9c48-eab160333d61

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