Fly ash as a new versatile acid-base catalyst for biodiesel production

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datacite.alternateIdentifier.citationRENEWABLE ENERGY,Vol.162,1931-1939,2020
datacite.alternateIdentifier.doi10.1016/j.renene.2020.09.099
datacite.creatorMunoz, Robinson
datacite.creatorGonzález Ruiz, Aixa
datacite.creatorValdebenito, Fabiola
datacite.creatorCiudad, Gustavo
datacite.creatorNavia, Rodrigo
datacite.creatorPecchi, Gina
datacite.creatorAzocar, Laura
datacite.date2020
datacite.subject.englishBiodiesel
datacite.subject.englishFatty acid methyl ester
datacite.subject.englishFly ash
datacite.subject.englishWaste frying oils
datacite.subject.englishResponse surface methodology
datacite.subject.englishTransesterification
datacite.titleFly ash as a new versatile acid-base catalyst for biodiesel production
dc.date.accessioned2021-04-30T17:04:10Z
dc.date.available2021-04-30T17:04:10Z
dc.description.abstractThe production of fatty acid methyl esters (FAME) from waste frying oil (WFO) was studied using fly ash as received as a heterogeneous catalyst. The fly ash used in this research had a high content of both CaO and SO3, two compounds that have been previously proposed as catalysts in FAME production. The study was carried out on the basis of a response surface methodology (RSM). The model generated by RSM predicted as optimal conditions to obtain a 100% FAME yield at a methanol-to-oil molar ratio of 3.1:1, 11.2 (wt.% based on oil weight) fly ash and a temperature of 59 degrees C with agitation at 245 rpm and 6 h of reaction time. Additional experiments comparing anhydrous with aqueous medium showed that fly ash presented a high catalytic capacity to transform free fatty acids (FFA) into FAME through consecutive hydrolysis and esterification processes (hydroesterification) compared with that associated with the transesterification mechanism. According to the results, the fly ash used in this study would act as a multipurpose or 'versatile' catalyst due to its chemical composition with constituents that act as acidic and basic catalysts, therefore, catalyzing the transesterification and hydroesterification reactions simultaneously and increasing the conversion yields of FAME. (C) 2020 Elsevier Ltd. All rights reserved.
dc.identifier.urihttp://repositoriodigital.uct.cl/handle/10925/3863
dc.language.isoen
dc.publisherPERGAMON-ELSEVIER SCIENCE LTD
dc.sourceRENEWABLE ENERGY
oaire.resourceTypeArticle
uct.catalogadorWOS
uct.indizacionSCI
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