Article In: orcid, scopus, cienciavitae
Study on the glycerolysis reaction of high free fatty acid oils for use as biodiesel feedstock
Fuel Processing Technology
2011
—Key information
Authors:
Published in
06/01/2011
Abstract
Biodiesel is the main alternative to fossil diesel and it may be produced from different feedstocks such as semirefined 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 oilswith 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 as temperature, % 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 (N20%) as they led to the production of an intermediary material with a low content of FFA that can be used directly in the transesterification reaction for the production of biodiesel.
Publication details
Authors in the community:
Pedro Miguel Guerreiro Felizardo
ist145974
João Espiga Machado
ist153334
João Carlos Moura Bordado
ist11307
João Fernando Pereira Gomes
ist123818
Publication version
AO - Author's Original
Title of the publication container
Fuel Processing Technology
First page or article number
1225
Last page
1229
Volume
92
Issue
6
Fields of Science and Technology (FOS)
chemical-engineering - Chemical engineering
Publication language (ISO code)
eng - English
Rights type:
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