Biodiesel Production from Waste Cooking Oil

Abstract

Increased energy consumption and the depletion of petroleum reserves have pushed up oil prices globally. The \ndiminishing petroleum reserves are a problem inherent in this type of fossil energy. One alternative energy \nsource that has the potential to be developed in Indonesia is biodiesel. Used cooking oil or used cooking oil is a \npotential raw material for making biodiesel. In this study biodiesel was made from used cooking oil and \nmethanol using the transesterification method with KOH catalyst. The production of biodiesel from used cooking \noil begins with mixing raw materials of used cooking oil collected into one. The mixture is then precipitated for \n24 hours. The transesterification process was carried out by mixing KOH (1% of oil weight) with methanol (ratio \nof methanol: oil 6: 1) at a temperature of 65 o \nC. After the temperature is reached, the methanol and KOH \nsolution is added slowly while pumping (stirring), with a variation of time 30, 45, 60.75 and 90 minutes. \nBiodiesel purification is done by washing using hot water (temperature 70 C) twice as much washing. \nCharacteristics of biodiesel based on the best conditions for density 0.886 g / mL, viscosity 5.89 cSt, FFA 0.11% \n, acid value 0.256 mgKOH/g and flash point 170.52 o \nC. The biodiesel products based on these parameters meet \nSNI 7182-2015 standards.