Biodiesel production from jatropha curcas oil and palm oil by using undirect ultrasonic assisted

The limitation of unrenewable energy required alternative renewable energy and environmental friendly. Biodiesel as one renewable energy that production from vegetable oil. The main reactions are on biodiesel production esterification and transesterification. Nevertheless, this reaction is slow, requires a lot of alcohol and a catalyst, the reaction has not been perfect. A mixing of vegetable that contain jatropha curcas oil and palm oil as feedstock. The objective of this research to optimumize of triglyceride conversion for three variable; include weight ratio jatropha curcas oil to palm oil catalyst concentration and molar ratio of methanol to oil. The experiments were carried out with ultrasonic undirect assisted‥ The operation condition was included ultrasonic frequency of 40 kHz and temperature of 60°C. The results showed that optimum condition was obtained in weight ratio jatropha and palm oil 2∶1, 1.5 wt% catalyst, and mole ratio of 6∶1 with a mixture of methanol-oil and conversion is 95.341%, where product are qualified SNI and ASTM.