Conversion of the Cerbera manghas L seed oil into biodiesel using homogenous catalys through esterification and transesterification stage have been done. Esterification process was carried out using mole ratio of methanol/oil 1:3, temperature 60-65°C for 2 hours with acid catalyst 1.25% H2SO4. The products were separated between methanol and triglycerides continued by transesterification process using mole ratio of methanol/oil 1:6. Initialy, the methanol have been reacted to NaOH catalyst using the catalyst variation 0.1; 0.2; 0.3; and 0.4%, for 2 hours and the reaction temperature 60-65°C. Biodiesel results were analysed by FTIR, GC-MS, and ASTM. The result show that the optimum biodiesel obtained on weiggt of catalyst is 0.3% NaOH. ASTM the test of results were obtained the propesties of the biodiesel there were: specific density of 0.8808 g/cm3, kinematic viscosity of 6.511 mm2/s, flash point 168°C, pour point 9°C, cloud point 12°C and conradson carbon residual 0.165 wt%.

Biogasoline is a benign energy product that can be produced through the process of breaking down biodiesel. The purpose of this study is to produce biogasoline from cooking oil waste through the cracking process using NiCl2 intercalated as a catalyst. Initially, waste from cooking oil was converted into biodiesel through a process of esterification and transesterification. After biodiesel with carbon chain lengths of 16-20 was acquired, the cracking process to produce biogasoline that had carbon chain lengths of 4-12 with the aid of a catalyst was conducted. The bentonite intercalated NiCl2 catalyst was calcined at a temperature of 600°C for 2 hours, then characterized by XRD and SEM. The results of the diffractogram with XRD showed a peak around 2θ: 44.67° which was the peak of the Ni crystalline. The cracking process of biodiesel was carried out at a temperature of 450°C and 500°C then characterized using GC-MS. The chromatograms generated at a temperature of 450°C showed the presence of three compounds belonging to the faction of biogasoline they were methyl 6-hydroxycaproate (C7H14O3), 4-hydroxymethyl-1,3-dioxolane (C4H8O3), and methyl nonylate (C10H20O2).

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