Mailani, Putri Julpa2023-11-152023-11-152023-07PerpustakaanElfitrahttps://repository.unri.ac.id/handle/123456789/11231Coconut husk (Cocos nucifera L.) is one of the most abundant parts obtained from coconut trees and is an underutilized waste material. Coconut husk ash contains silica, which has the potential to act as a heterogeneous acid catalyst. This research aims to synthesize biodiesel using waste cooking oil as the feedstock and employing coconut husk as a catalyst in the synthesis process. The catalyst used is SiO2 impregnated with sulfuric acid. The weight variation of the catalyst used is 5, 7, and 10wt% at a temperature of 60oC with a molar ratio of oil to methanol of 1:12. The research results indicate that a maximum yield of 35.5% biodiesel was obtained with a catalyst weight of 10wt%. However, the characteristics of the produced biodiesel do not yet meet the SNI 7182-2015 standards concerning density and viscosity.enbiodieselcatalystSiO2Article