Abstract:
Biodiesel is renewable energy, biodegradable, and environmental friendly for diesel
machine. Biodiesel was synthesized from palm oil through transesterification using
catalysts K-CaO. The K-CaO catalyst was synthesized using the sol-gel method and
calcined at 700, 800, and 900 oC for 3 hours. Catalyst characterization using BET to
determine the surface. The surface area obtained was 1.679 m2 / g, 0.999 m2 / g and
7.678 m2 / g in K-CaO-700, K-CaO-800 and K-CaO-900 Catalysts. The maximum yield
of biodiesel obtained was 88,2189% at the optimum reaction time of 2 hours and a
reaction temperature of 60oC (catalyst weight 3%, oil and methanol mole ratio 1:6 and
stirring 500 rpm). The maximum yield of biodiesel is characterized based on biodiesel
quality standards. water content 0.0181%, specific gravity 880,1 kg / m3, viscosity
5,9756 mm2 / s, carbon residue 0.82%, acid number 0.358 mg KOH / g. In general, the
characteristics of biodiesel fill up the quality requirements of SNI 7182-2015.
