Abstract
Biodiesel is a very potential fuel to replace diesel fuel. WCO can be used as raw material for making biodiesel. One method of making biodiesel is by using microwave irradiation. Microwave heating is more advantageous than conventional method heating, because conventional method heating is very slow and inefficient. This study aims to determine the effect of power, reaction time and physical properties of raw materials in the manufacture of biodiesel from waste cooking oil using microwave irradiation. The experimental stage consists of pretreatment, transesterification, separation, washing, and analysis of biodiesel yields. Transesterification of waste cooking oil takes place in a microwave oven by: (a) variations in microwave power (100, 180, 300, 450, and 600 Watt) at 5 min, and (b) reaction time variation (5, 10, 15, 20 and 25 minutes) at a fixed power of 100 Watt. From the research it is known that the operating conditions to produce the best yield of biodiesel yield on 100 watt microwave power and heating time for 10 minutes. The yield of biodiesel is 93.06%. The laboratory analysis results show five methyl ester compounds (biodiesel) such as methyl myristate, methyl palmitate, methyl linoleate, methyl oleate, and methyl stearate. The physical properties of biodiesel produced have met several criteria of Dirjen Migas no 13483K / 24 / DJM / 2006 for biofuel / biodiesel and SNI 04 - 7182 (2012).
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