Pengaruh Perbedaan Jumlah Katalis terhadap Angka Yield pada Proses Pembuatan Biodiesel dari Minyak Goreng Sisa Menggunakan Pemanas Double Jacket

Biodiesel is biodegradable and non-toxic has a low carbon content, high lubricity, <p>Biodiesel higher ash point than diesel. The purpose of this study was to obtain data on the physicochemical properties biodiesel from waste cooking oil (WCO) produced with different amounts catalyst in transesterification process. Methods This research carried out two-step process: (1) esterification an acid (H<sub>2</sub>SO<sub>4</sub>) (2) alkali (KOH). remaining frying degummed by adding 2% H<sub>3</sub>PO<sub>4</sub>. Furthermore, process (v/v) H<sub>2</sub>SO<sub>4</sub> at 800 rpm for 90 minutes. using alkaline (KOH) varied 0.7-1.5% temperature 60 <sup>o</sup>C rotation time In ester/transesterification process, ratio methanol: 1:2 (v/v). biofuels are then tested cetane number, flash point, density, viscosity, calorific value, others. results showed that amount wet gave difference yield WCO oil. optimum value obtained 1% KOH catalyst, which 85%.</p>