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Optimization of pretreatment of jatropha oil with high free fatty acids for biodiesel production

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Resumo:A central composite rotatable design and response surface methodology were used in order to investigate the individual and combined effects of the ethanol-to-oil ratio, H2SO4 concentration, temperature and time of reaction on the reduction of free fatty acid (FFA) in jatropha oil. A quadratic polynomial model relating the reaction variables with FFA reduction was developed, presenting a good coefficient of determination (R2= 0.893). For reducing FFA to less than 1%, the optimal combination was found to be 0.62 v$v–1 ethanol-to-oil ratio (14.9 v$v–1 ethanol-to-FFA ratio), 1.7% v$v–1 H2SO4 concentration,and 79 min reaction time at a reaction temperature of 54°C. These results are of great relevance to maximize methyl esters formation by transesterification using an alkaline catalyst.
Autores principais:Suwito, Supriyono
Outros Autores:Dragone, Giuliano; Sulistyo, Hary; Murachman, Bardi; Purwono, Suryo; Teixeira, J. A.
Assunto:Biodiesel Biofuel Esterification Free fatty acids Jatropha curcas oil
Ano:2012
País:Portugal
Tipo de documento:artigo
Tipo de acesso:acesso aberto
Instituição associada:Universidade do Minho
Idioma:inglês
Origem:RepositóriUM - Universidade do Minho

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