Estudio de la obtención de biodiesel a partir de aceite de piñón (Jatropha curcas) con acetona como co-solvente a condiciones subcríticas

Abstract

The study of the subcritical transesterification of pinion oil with acetone was performed at pressures of 1.5; 1.4 and 1.25 MPa and temperatures of 363.15; 373.15 and 378.15 K, The biodiesel properties were evaluated at these conditions. As a result, the best pressure and temperature conditions were 1,5 MPa and 363,15 K; the average performance was 92,96 %, cetane number 48,10 and kinematic viscosity 5,42 cSt. Consecutively the transesterification with the use of acetone was evaluated, varying the molar concentrations of the methanol / acetone in 1: 1; 1: 1.5 and 1: 2. The highest yield obtained was 95.95 % for the molar ratio corresponding to 1; 1.5 methanol / acetone, the cetane number obtained was 49.94 and the kinematic viscosity was 4.41 cSt. Finally, the biodiesel properties were compared as well as the yield obtained by this study with the yield obtained with transesterification catalytic, non-catalytic and under supercritical conditions. This study wants to increase the use of pinion oil focused on biodiesel production by improving the productive matrix in this sector.