Effect of transesterification on the result of waste cooking oil conversion to biodiesel

Biodiesel is one of the greenest alternative fuels and can be produced from vegetable, waste cooking, and animal oils. Waste cooking oil is one of the raw materials that have a high chance of making biodiesel because it contains a very abundant tryglicerides. It is reacted with alcohol and NaOH catalyst through a transesterification reaction. Transesterification takes place inside a three-neck flask that has been equipped with condenser reflux, magnetic stirrer, and a thermometer. To know the effect by using variations of 60 minutes, 90 minutes, 120 minutes, and 150 minutes In this study, the optimum biodiesel conversion of WCO catfish seller was 85.2% preselected at a 1: 6 molar ratio, with 1% NaOH catalyst in 60 minutes. Meanwhile, conversion biodiesel from WCO of household used and WCO of fried sellers were respectively 82.34% and 82.20%. Based on the test of biodiesel properties resulting from the density, viscosity, acid number, water content, flash point and PH that biodiesel have been compliant with SNI. Biodiesel density of 880 kg/m 3 , acid number 0.27 mg-KOH/g, and has a maximum water content of 0.05. This biodiesel has the main compound the name is palmitic acid which 45.73%.