Transesterifikasi Minyak Jelantah Menjadi Biodiesel Menggunakan Gelombang Ultrasonik dan Katalis Na2O/Fly Ash
Abstract
Biodiesel is an alternative fuel for diesel engine made from animal fats or vegetable oils with an alcohol. In this experiment, biodiesel was produced by transesterification of Waste Cooking Oil (WCO) and methanol in the presence ofNa2O/fly ash as a catalyst. Ultrasonic assisted transesterification was performed by varying reaction time. The fixed variables included the reaction temperature of 40°C, oil to methanol molar ratio of 1:10 and catalyst loading of 4%-wt. The highest biodiesel yield 89.53% was obtained at the reaction time of 60 minutes. Analysis using Gas Chromatography Mass Spectroscopy showed that biodiesel contain mostly methyl ester oleate (53.54%), methyl ester palmitate (38.23%), methyl ester stearate (5.12%) and methyl ester myristate (1.14%).
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