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

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dc.contributor.authorMunoz, Robinson
dc.contributor.authorGonzález Ruiz, Aixa
dc.contributor.authorValdebenito, Fabiola
dc.contributor.authorCiudad, Gustavo
dc.contributor.authorNavia, Rodrigo
dc.contributor.authorPecchi, Gina
dc.contributor.authorAzocar, Laura
dc.date2020
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.citationRENEWABLE ENERGY,Vol.162,1931-1939,2020
dc.identifier.doi10.1016/j.renene.2020.09.099
dc.identifier.urihttp://repositoriodigital.uct.cl/handle/10925/3863
dc.language.isoen
dc.publisherPERGAMON-ELSEVIER SCIENCE LTD
dc.sourceRENEWABLE ENERGY
dc.subject.englishBiodiesel
dc.subject.englishFatty acid methyl ester
dc.subject.englishFly ash
dc.subject.englishWaste frying oils
dc.subject.englishResponse surface methodology
dc.subject.englishTransesterification
dc.titleFly ash as a new versatile acid-base catalyst for biodiesel production
dc.typeArticle
uct.catalogadorWOS
uct.indizacionSCI
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