Artículos de revistas
Transesterification of sunflower oil with ethanol using sodium ethoxide as catalyst. Effect of the reaction conditions
Fecha
2015-03Registro en:
Sanchez, Barbara Sabrina; Benitez, Belarmina; Querini, Carlos Alberto; Mendow, Gustavo; Transesterification of sunflower oil with ethanol using sodium ethoxide as catalyst. Effect of the reaction conditions; Elsevier; Fuel Processing Technology; 131; 3-2015; 29-35
0378-3820
CONICET Digital
CONICET
Autor
Sanchez, Barbara Sabrina
Benitez, Belarmina
Querini, Carlos Alberto
Mendow, Gustavo
Resumen
Typically, biodiesel is produced using vegetable oil and methanol as raw materials, and sodium methoxide as catalyst, whereupon the obtained product is composed of methyl esters. However, the use of ethyl esters as biodiesel presents many advantages compared to the methyl esters. In this work, the transesterification with ethanol to produce ethyl esters using sodium ethoxide as catalyst was studied. The effect of temperature and alcohol and catalyst concentration on the reaction conversion was investigated, in order to optimize these parameters while also meeting the quality standards. It was found that the optimal reaction conditions are: 1.6 wt.% sodium ethoxide, 25 v/v% ethanol and 55 °C, which allow obtaining a biodiesel composed 100% by ethyl esters that complies with the international quality standards. On the other hand, it was observed that methanolysis reactions are faster than the ethanolysis and sodium methoxide catalyst is more active than the corresponding ethoxide, due to the higher steric hindrance of the ethoxi-radical and to the more intense saponification of sodium ethoxide in ethanol medium.