Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/2246
Título: Study on the glycerolysis reaction of high free fatty acid oils for use as biodiesel feedstock
Autor: Felizardo, Pedro
Machado, João
Vergueiro, Daniel
Correia, M. Joana N.
Gomes, João Pereira
Bordado, João Moura
Palavras-chave: Biodiesel feedstock
Acid oils
Soap-stocks
Glycerolysis
Near-infrared spectroscopy
Esters
Data: Jun-2011
Editora: Elsevier Science BV
Citação: FELIZARDO, Pedro; MACHADO, João; VERGUEIRO, Daniel; CORREIA, M. Joana N.; GOMES, João Pereira; BORDADO, João Moura - Study on the glycerolysis reaction of high free fatty acid oils for use as biodiesel feedstock. Fuel Processing Technology. ISSN 0378-3820. Vol. 92. n.º 6 (2011) p. 1225-1229.
Resumo: Biodiesel is the main alternative to fossil diesel and it may be produced from different feedstocks such as semi-refined vegetable oils, waste frying oils or animal fats. However, these feedstocks usually contain significant amounts of free fatty acids (FFA) that make them inadequate for the direct base catalyzed transesterification reaction (where the FFA content should be lower than 4%). The present work describes a possible method for the pre-treatment of oils with a high content of FFA (20 to 50%) by esterification with glycerol. In order to reduce the FFA content, the reaction between these FFA and an esterification agent is carried out before the transesterification reaction. The reaction kinetics was studied in terms of its main factors such astemperature, % of glycerin excess, % of catalyst used, stirring velocity and type of catalyst used. The results showed that glycerolysis is a promising pretreatment to acidic oils or fats (> 20%) as they led to the production of an intermediary material with a low content of FFA that can be used directly in thetransesterification reaction for the production of biodiesel. (C) 2011 Elsevier B.V. All rights reserved.
Peer review: yes
URI: http://hdl.handle.net/10400.21/2246
ISSN: 0378-3820
Aparece nas colecções:ISEL - Eng. Quim. Biol. - Artigos

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