Aman Santoso, Sumari Sumari, Aldi Nur Sahbana, Anugrah Ricky Wijaya, Rini Retnosari, Eli Hendrik Sanjaya, Muhammad Roy Asrori
The purpose of this research are to synthesis methyl ester from used cooking oil refined with zeolite and activated pumice and to investigate its potential as biodiesel. The research stages were activating the natural zeolite and pumice with temperature variations of 500 and 600 °C, refining waste cooking oil with various concentrations, trans-esterification of refined waste cooking oil, characterization and identification of methyl esters by using Gas Chromatography-Mass Spectrometry (GC-MS). The best refining was resulted from free fatty acids and clarity at a concentration of 30% natural zeolite with a yield of 67.17%. The trans-esterified methyl esters have a density of 0.881 g/mL, refractive index of 1.447, viscosity of 4.92 cSt, acid number of 0.49 mg-KOH/g, and saponification number of 198.8 mg-KOH/g, which have high potential as biodiesel. The main components of trans esterified methyl ester from refined waste cooking oil are methyl palmitate, methyl oleate, and methyl stearate with the compositions of 46.27, 40.26, and 5.19%, respectively. © 2023 American Institute of Physics Inc.. All rights reserved.
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Jl. Semarang No.5, Malang, 65145, Indonesia