| dc.description.abstract | Biodiesel is an eco-friendly alternative fuels because derivided from vegetable oils or
animal fats. Waste cooking oil is a waste oil that comes from many type of cooking
oils such as corn oil, vegetable oil, sanin oil, and ect. The purpose of this research is
the use of waste cooking oil as a raw material to form biodiesel with K2O as the solid
catalyst. The solid catalyst derived from cocoa pod ash(CPA). The CPAis calcined to
form K2O as catalyst with temperature 650o
C within 4 hours. This oil contain a high
level of FFA that is 3.13%. Therefore, pretreatment should be done using activated
carbon (1% w / w of raw materials) to reduce levels of FFA. The resultingproduct
from pretreatment phase is transesterified to form biodiesel and glycerol. The
research observe the effect of reaction time and the percentage of catalyst. The
characteristics of biodiesel is analyzed according to the levels of methyl ester in
biodiesel, density, and viscosity based on the Indonesian National Standard (SNI).
The best conditions of biodiesel are obtained with the amount of catalyst 6% (w/w)
that is calcined at 650 °C, reaction time 180 minute, ratio mol of alcohol : oil 12: 1,
and temperature of reaction 65o
C, resulting the purity and yield of biodiesel is 99,8%
and 92,68%/ in sequence. The results of this research indicates that the use of waste
cooking as a raw material is suitable in the manufacture of biodiesel. | en_US |
