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Biodiesel production over lithium modified lime catalysts: activity and deactivation

2014-01-30Journal article Restricted access
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dc.contributor.authorPuna, Jaime
dc.contributor.authorGomes, João
dc.contributor.authorBordado, João
dc.contributor.authorNeiva Correia, Maria Joana
dc.contributor.authorDias, Ana Paula Vieira Soares Pereira
dc.date.accessioned2015-08-24T10:06:47Z
dc.date.available2015-08-24T10:06:47Z
dc.date.issued2014-01-30
dc.description.abstractBiodiesel production by methanolysis of semi-refined rapeseed oil was studied over lime based catalysts. In order to improve the catalysts basicity a commercial CaO material was impregnated with aqueous solution of lithium nitrate (Li/Ca = 03 atomic ratio). The catalysts were calcined at 575 degrees C and 800 degrees C, for 5 h, to remove nitrate ions before reaction. The XRD patterns of the fresh catalysts, including the bare CaO, showed lines ascribable to CaO and Ca(OH)(2). The absence of XRD lines belonging to Li phases confirms the efficient dispersion of Li over CaO. In the tested condition (W-cat/W-oil = 5%; CH3OH/oil = 12 molar ratio) all the fresh catalysts provided similar biodiesel yields (FAME >93% after 4 h) but the bare CaO catalyst was more stable. The activity decay of the Li modified samples can be related to the enhanced, by the higher basicity, calcium diglyceroxide formation during methanolysis which promotes calcium leaching. The calcination temperature for Li modified catalysts plays an important role since encourages the crystals sinterization which appears to improve the catalyst stability. (C) 2013 Elsevier B.V. All rights reserved.por
dc.identifier.citationPUNA, Jaime Filipe Borges; [et al] – Biodiesel production over lithium modified lime catalysts: Activity and deactivation. Applied Catalysis A: Generalrnal of Cleaner Production. ISSN: 0926-860X. Vol. 470 (2014), pp. 451-457por
dc.identifier.doi10.1016/j.apcata.2013.11.022
dc.identifier.issn0926-860X
dc.identifier.issn1873-3875
dc.identifier.urihttp://hdl.handle.net/10400.21/4922
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevier Science BVpor
dc.relation.publisherversionhttp://www.sciencedirect.com/science/article/pii/S0926860X13007126#
dc.subjectBiodieselpor
dc.subjectLime Catalystspor
dc.subjectBasicitypor
dc.subjectLithiumpor
dc.subjectMethoxidepor
dc.subjectDiglyceroxidepor
dc.subjectCa Leachingpor
dc.titleBiodiesel production over lithium modified lime catalysts: activity and deactivationpor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceAmsterdampor
oaire.citation.endPage457por
oaire.citation.startPage451por
oaire.citation.titleApplied Catalysis A: Generalrnal of Cleaner Productionpor
oaire.citation.volume470por
person.familyNamePuna
person.familyNameGomes
person.familyNameBordado
person.familyNameNeiva Correia
person.givenNameJaime
person.givenNameJoão
person.givenNameJoão
person.givenNameMaria Joana
person.identifier790253
person.identifier60203
person.identifier2847189
person.identifier.ciencia-idEE14-5CB2-AF04
person.identifier.ciencia-id0212-E6D6-566C
person.identifier.ciencia-id5A1C-D29F-324A
person.identifier.ciencia-idB717-7E28-15E1
person.identifier.orcid0000-0002-2763-3655
person.identifier.orcid0000-0003-2579-6669
person.identifier.orcid0000-0002-9832-6433
person.identifier.orcid0000-0002-9100-2700
person.identifier.ridA-6442-2011
person.identifier.ridM-1952-2014
person.identifier.ridA-1519-2013
person.identifier.scopus-author-id24402152700
person.identifier.scopus-author-id56113031900
person.identifier.scopus-author-id6603731772
person.identifier.scopus-author-id7102145852
rcaap.rightsclosedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublicationcc1ba86f-9699-4622-a467-dece54231697
relation.isAuthorOfPublicatione44cd72e-bcbb-4612-a274-60cb1915bc0c
relation.isAuthorOfPublicatione0b6d47e-98c2-47c2-a48c-45041d3fb841
relation.isAuthorOfPublication00f01ded-9d0b-4845-b8e5-114e469fe090
relation.isAuthorOfPublication.latestForDiscovery00f01ded-9d0b-4845-b8e5-114e469fe090

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