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Biodiesel production by transesterification using choline hydroxide as catalyst

2025Póster em conferência Acesso aberto
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datacite.subject.fosEngenharia e Tecnologia::Engenharia Química
datacite.subject.fosEngenharia e Tecnologia::Biotecnologia Industrial
datacite.subject.sdg09:Indústria, Inovação e Infraestruturas
dc.contributor.authorLima, Renata
dc.contributor.authorQueiroz, Ana
dc.contributor.authorRibeiro, António E.
dc.contributor.authorBrito, Paulo
dc.date.accessioned2026-03-23T10:14:46Z
dc.date.available2026-03-23T10:14:46Z
dc.date.issued2025
dc.description.abstractBiodiesel is a mixture of alkyl esters derived from vegetable oils or animal fat. Itis a biodegradable and renewable fuel and does not contribute to the emission of polluting gases into the atmosphere. Still, its major disadvantage is its relatively high cost, usually regarding production and raw materials costs (Langet al., 2001). Crude oils and fats extracted from plants and animals are alternatives to highly polluting fossil fuels. They are composed of triglycerides, which can be converted into biofuels through transesterification processes. The alcoholysis of vegetable oils or animal fats may be carried out using different catalysts: acids, bases, and enzymes. Basic catalysts, sodium or potassium hydroxide, are about 4,000 times faster than acid catalysts and do not require large amounts of alcohol. On the other hand, ionic liquids (ILs) use in catalytic processes has been studied mainly in the ecological field, as it allows a high recycling efficiency. ILs based on the choline cation (2-hydroxyethyl trimethylammonium) have received much attention, mainly due to its biocompatibility characteristics and potential for various industrial applications. Choline hydroxide (ChOH – see Fig. 1) in particular represents a promising option due to its good catalytic performance in methanol solution and its successful reuse (Fan et al., 2013). This work's main objective was to optimize the methyl transesterification reaction conditions using commercial and waste sunflower oil as raw material and ChOH as catalyst. The possibility of recovering the ChOH catalyst between reaction cycles was also assessed.eng
dc.identifier.citationLima, Renata; Queiroz, Ana; Ribeiro, António E.; Brito, Paulo (2025). Biodiesel production by transesterification using choline hydroxide as catalyst. In ECCS2025 – The 3rd International Electronic Conference on Catalysis Sciences. Online
dc.identifier.urihttp://hdl.handle.net/10198/36201
dc.language.isoeng
dc.peerreviewedno
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectBiodiesel
dc.titleBiodiesel production by transesterification using choline hydroxide as catalysteng
dc.typeconference poster
dspace.entity.typePublication
oaire.citation.conferenceDate2025
oaire.citation.conferencePlaceOnline
oaire.citation.titleECCS2025 – The 3rd International Electronic Conference on Catalysis Sciences
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
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
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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