Intensification of Biodiesel And Other Chemical Products (Ethyl Levulinate) From Rice Bran Using In-Situ Transesterication Method Without Catalyst In Subcritical Ethanol – Water
Siti Zullaikah, Rosada Yulianti Naulina
Institute Technology of Sepuluh Nopember
Abstract
Intensification of biodiesel and other chemical products (ethyl levulinate) from rice bran using in-situ transesterication method without catalyst in subcritical ethanol – water has been investigated. This method known to be economical because the experiment steps are reduce and environmentally friendly because we no use a catalyst. Then, the method found to be unaffected in Free Fatty Acid (FFA) contents in rice bran and moisture, so that pretreatment was no required. In this experiment used CO2 as a pressure gas and ethyl acetate as co- solvent for increasing the yield. This reactor is equipped with a stirrer used a magnetic stirrer of rice bran, a mixture of water, ethanol and ethyl acetate in mol ratio 1: 10: 9: 2 and was inserted into the reactor, then injects CO2 gas to increase the pressure and to ensure the reaction occurs under subcritical conditions under an operating pressure of 80 bar. Temperature (120 – 200ᵒC) and reaction time (30 minute - 4 hours) were investigated to increase yield biodiesel and chemicals. It has been known that a longer time affects the increase in the yield of biodiesel chemicals followed by an increase in reaction temperature (200ᵒC).
Keywords: rice bran; biodiesel; subcritical
Topic: Chemical Engineering