Abstract
This study aims to determine the effect of CaO catalyst amount and reaction time to the quality of biodiesel produced. The CaO catalyst used was obtained from the shell of the blood clam by means of calcinations at temperature of 1000 °C for 5 hours, in order to activate the CaO compound in the shell of the blood clam. The transesterification process was carried out with 2 independent variables, namely the amount of catalyst and reaction time. Variations of catalyst were 0.5%, 1%, 1.5%, 2%, and 2.5% tothe weight of waste cooking oil, while the reaction times were varied in 60 minutes, 120 minutes and 210 minutes. The results of the research shown that the amount of catalyst and reaction time affected the quality of biodiesel produced.Theoptimum amount of catalyst was 2.5% of weight at120 minutes optimum reaction time yielded of 59.89%, with 0.868 gr/mLdensity, 5.65 cStviscosity, 0.458 mgKOH/gr acid value, 0.045% moisture content, 1780Cflash point, and 9557.78 cal / gr calorific value.
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