BIODIESEL FROMJATROPHA CURCASWITH ESTERTRANSESTERIFICATION INSITU METHOD

Jatropha curcas grows in various places in Indonesia abundantly. Seed of jatropha curcas can be processed tobe biodiesel because it contains oil substance, especially triglyceride which is the main components of biodiesel. The process of making biodiesel from jatropha curcas will pass ester-transesterification insitu reaction by using acid and base catalyst. The objectives of this research are(i)knowing the jathropa seeds powder can be reacted directly (ester-transesterifikasi insitu)to produced biodiesel. (ii) determining the influence of temperature and percent catalyst to the quantity of biodiesel production. (iii) determining the influence of temperature and percent catalyst for the quality of biodiesel with density, viscosity and acid number parameters. In this research, first, seed of jatropha curcas must be mashed into powder, so it can be reacted directly. Esterification of the jatropha seeds powderuses sulfuric acid (H2SO4) catalyst and transesterification uses sodium hydroxide (NaOH) catalyst. Gravimetric and volumetric analyse quantitatively analysis are used to analyse biodiesel produced. Sample on 1 % catalyst and 70oC temperature is a the best product in quality and sample on 3 % catalyst and 70oC temperature is a the best product in quantity.