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Strontium-doped lime catalysts for biodiesel production: activity and stability during soybean oil methanolysis

2017Journal article Restricted access
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dc.contributor.authorDias, Ana Paula Soares
dc.contributor.authorPuna, Jaime
dc.contributor.authorNeiva Correia, Maria Joana
dc.contributor.authorGomes, João
dc.contributor.authorBordado, João
dc.date.accessioned2020-04-13T16:13:51Z
dc.date.available2020-04-13T16:13:51Z
dc.date.issued2017
dc.description.abstractBiodiesel produced by alcoholysis of vegetable oils is a low carbon fuel, which can replace the fossil diesel in internal combustion engines. CaO is a cheap and environmentally benign material showing interesting catalytic performances in the methanolysis reaction of vegetable oils. However, the reaction rate is slower than the conventional homogeneous-catalyzed by sodium methoxide. In order to improve the catalytic activity, lime catalyst (commercial) was doped with different amounts of strontium. The catalysts, prepared by wet impregnation using aqueous solutions of nitrate salt, were calcined at 575 °C and 800 °C. The physical-chemical characterization of catalysts showed that the doping element had an apparently null effect on the basicity assessed by Hammett indicators. The Ca(OH)2, with weak basicity, formed in the Sr-modified catalysts eventually masked the Sr effect on the basicity. In the tested conditions, all the prepared catalysts were active allowing fatty acid methyl esters’ (FAME) yields higher than 94%. The catalyst stability tests, performed without intermediate reactivation, showed that Sr dopant promoted accelerated decay due to calcium diglyceroxide formation which is leached into the reaction medium. High temperature calcination had a negative effect on the catalyst stability due to the formation of Ca(OH)2. Such undesired effect was prompted by the Sr dopant.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationDIAS, Ana Paula Soares – Strontium-doped lime catalysts for biodiesel production. Activity and stability during soybean oil methanolysis. Current Topics in Catalysis. ISSN 0972-4508. Vol. 13 (2017), pp. 35-42pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.21/11448
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherResearch Trendspt_PT
dc.subjectBiodieselpt_PT
dc.subjectLime catalystpt_PT
dc.subjectAlkali dopantspt_PT
dc.subjectBasicitypt_PT
dc.subjectMorphologypt_PT
dc.subjectDeactivationpt_PT
dc.subjectStrontiumpt_PT
dc.titleStrontium-doped lime catalysts for biodiesel production: activity and stability during soybean oil methanolysispt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage42pt_PT
oaire.citation.startPage35pt_PT
oaire.citation.titleCurrent Topics in Catalysispt_PT
oaire.citation.volume13pt_PT
person.familyNamePuna
person.familyNameNeiva Correia
person.familyNameGomes
person.familyNameBordado
person.givenNameJaime
person.givenNameMaria Joana
person.givenNameJoão
person.givenNameJoão
person.identifier790253
person.identifier2847189
person.identifier60203
person.identifier.ciencia-idEE14-5CB2-AF04
person.identifier.ciencia-idB717-7E28-15E1
person.identifier.ciencia-id0212-E6D6-566C
person.identifier.ciencia-id5A1C-D29F-324A
person.identifier.orcid0000-0002-2763-3655
person.identifier.orcid0000-0002-9100-2700
person.identifier.orcid0000-0003-2579-6669
person.identifier.orcid0000-0002-9832-6433
person.identifier.ridA-6442-2011
person.identifier.ridA-1519-2013
person.identifier.ridM-1952-2014
person.identifier.scopus-author-id24402152700
person.identifier.scopus-author-id7102145852
person.identifier.scopus-author-id56113031900
person.identifier.scopus-author-id6603731772
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationcc1ba86f-9699-4622-a467-dece54231697
relation.isAuthorOfPublication00f01ded-9d0b-4845-b8e5-114e469fe090
relation.isAuthorOfPublicatione44cd72e-bcbb-4612-a274-60cb1915bc0c
relation.isAuthorOfPublicatione0b6d47e-98c2-47c2-a48c-45041d3fb841
relation.isAuthorOfPublication.latestForDiscoverye0b6d47e-98c2-47c2-a48c-45041d3fb841

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