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Nyamplung  (Calophyllum inophyllum Linn)  is a non edible that has the potential to produce high yield biodiesel. Oil nyamplung in this study had amounted to 27,498% FFA content, therefore, needs a pretreatment process consisting of degumming to remove gum, esterification and neutralization to lower FFA &lt;2% so that the oil can be resumed in the transesterification process. The purpose of this research to study the effect of microwave power, time and temperature of the reaction to yield biodiesel, identify methyl ester in the product and assess the kinetics of making biodiesel from oil nyamplung using microwave irradiation. Transesterification is done by using a variation of power (100, 200 and 400W), variations of time (5, 7, 10, 12 and 15 minutes) and variations of temperature (50, 55, 60, 65 and 70 °C). The results showed the best conditions using microwave power of 200 W at 65 ° C for 5 minutes, maximum yield of 84,62% biodiesel and biodiesel physical properties meet the standard of SNI 04-7182-2006. GCMS analysis showed that the methyl ester of biodiesel oil nyamplung is 30,23% methyl oleic, 25,76% methyl linolelaidate, 19.21% methyl palmitate, 15,75% methyl stearic, 2,11% methyl lignocerate, 1,41%, methyl eicosanoic, 0,54% methyl behenate and 0,37% methyl palmitoleic. Transesterification reaction rate constant of first order at a temperature of 55 °C, 65 °C and 70 °C is 0,395 min −1 , 0,405 min −1  and 0,412 min −1 . Pre exponential factor (A) amounted to 1,0161 L / mol min; the activation energy (Ea) 2579,834 J/mole and the rate of transesterification reaction (rt) = 1,0161e (2579,834/RT) [ME]. The results of this study showed that the rate of reaction using microwave irradiation higher and the reaction time becomes 1/6 times faster with activation energy value is smaller than with conventional methods.

The Effect of Use Microwave Irradiation in Produce Biodiesel Nyamplung Oil (Calophyllum inophyllum Linn) Using KOH Catalyst