Engenharia Química

Resultados da Pesquisa

Agora exibindo 1 - 2 de 2

Influence of feedstock on biodiesel corrosiveness and degradation
(2014-11-16) Isabella Aquino; ALVES, T. P.; SILVA, F. F. R; AOKI, I. V.; Ricardo Torres
Transesterification of sunflower oil produced by solvent extraction
(2014-11-16) Maristhela Passoni de Araújo Marin; Luis Novazzi; DENARI, M. L.
In this work, the leaching of oil from sunflower seeds using hexane was studied. The solution of oil / hexane was thereafter transesterified, with methanol and potassium hydroxide (KOH) as the catalyst, in a batch reactor, for 1 hour and with a constant temperature of 45 °C. It is important to point out that the extracted oil was not refined and was directly used on transesterification reactions. The hexane in the oil / hexane solution acted as a cosolvent and made the oil / methanol mixture forms a single-phase. Experimental results obtained in the transesterification reactions showed that the increase of methanol / oil mole ratio on reaction yield is negative, whereas the increase of catalyst concentration on reaction yield is positive. Reaction yields decreased 18.00% on average when the mole ratio methanol / oil was increased. When catalyst concentration was augmented, reaction yields increased 15.19%, on average. These results are statistically meaningful, since the standard deviation was equal to 0.48%. Moreover, an interaction between methanol / oil mole ratio and catalyst concentration on reaction yield was observed.