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Chemical Science International Journal

Chemical Science International Journal, 2456-706X,Vol.: 17, Issue.: 3




Biodiesel from Residual Oils: Less Environmental Impact with Sustainability and Simplicity 



Rafael do Nascimento Pereira1, Francisco Sávio Gomes Pereira2*, Chesque Cavassano Galvão1, Ana Maria Ribeiro Bastos da Silva1, Valdinete Lins da Silva1, Maria Aparecida Guilherme da Rocha3 and Nelson Medeiros de Lima Filho1

1Department of Chemical Engineering, Federal University of Pernambuco – UFPE, Center of Technology and Geosciences, Recife, PE, Brazil.

2Federal Institute of Education, Science and Technology of Pernambuco – IFPE, Campi Recife and Ipojuca, Recife, PE, Brazil.

3Federal University of Pernambuco – UFPE, Coordination of Science Teaching of Northeast –CECINE, Recife, Brazil.




This study shows viability energetic with residual frying oils. The oils collected and filtered were characterised in some analytical parameters and converted into biodiesel by homogeneous alkaline transesterification (molar ratio of 6:1, methanol: oil, 60 minutes, 60°C, and stirring of 300 rpm and 1% of NaOH). After reaction, decanted for 3 hours and purified with 0.5% phosphoric acid and distilled water. Heated at 110°C (water bath and vacuum distillation system) for the removal of residual methanol. The purified biodiesel was treated with anhydrous sodium sulphate, filtered and characterised in acid value, specific mass, kinematic viscosity, turbidity, water content and purity of ester. The results showed that the alkaline transesterification is a powerful tool for the conversion of saponifiable fatty acids into biodiesel, represented by the yield of 82% and 94.4% in purity of methyl esters, even with its demand for purification of the feedstock to reduce acidity and water content.


Keywords :

Alkaline transesterification; frying; residual oils; sustainable energy; waste feedstocks.


Full Article - PDF    Page 1-14    Article Metrics


DOI : 10.9734/CSJI/2016/29455

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