PEMBUATAN BIODIESEL DARI MINYAK JELANTAH DENGAN KATALIS ZEOLITE TERIMPREGNASI KOH

Abstract

Energy is a basic human need that continues to increase with time. At the moment, the fuel coming from non-renewable energy sources such as fossil fuels are limited in quantity and produce combustion that is less likely to be environmentally friendly. Due to this problem, Indonesia needs to develop renewable energy sources as an alternative energy, one of which is biodiesel. Waste cooking oil is an oil derived from the leftover frying oil of foodstuffs. Waste vegetable cooking oil is very likely to be used as a raw material in the manufacture of biodiesel, because in addition to containing free fatty acids, it also contains triglycerides. The aim of this study is to determine the influence of KOH/zeolite catalyst concentration and mole ratio between sooty oil and methanol on the manufacture of biodiesel based on SNI 7182:2015 standards. The catalyst was prepared from zeolite which was first activated by soaking in 6 N HCl and then impregnated using a 20% KOH solution and calcined for 4 hours at 800°C. The manufacture of biodiesel was carried out by first esterification at 60°C for 1 hour and then followed by transesterification at 65°C for 2 hours by varying the amount of catalyst 4%, 5%, 6%, 7%, 8% and mole ratios of soil:methanol 1:9 and 1:20. The best biodiesel yield was obtained at a catalyst quantity variation of 8% with 3 a crude oil:methanol mass ratio of 1:20 with a density of 885.3 kg/m , a viscosity of 5.7576 cSt, and a %yield of 78.68%.a 3 crude oil:methanol mass ratio of 1:20 with a density of 885.3 kg/m , a viscosity of 5.7576 cSt, and a %yield of 78.68%. Keywords: alum, biodiesel, potassium hydroxide (KOH), waste cooking oil.