Abstract
Biofuel is a solution to reduce the dependence of fossil fuels. Pure Plant Oil (PPO) of Calophyllum inophyllum L. is a potential raw material for green diesel through the processes of deoxygenation, hydrotreating, and isomerization. Deoxygenation of the PPO with NiMo / Al2O3 catalyst was carried out in a stirred autoclave reactor at a temperature of 300 - 400°C for 3 hours, and the water/PPO ratio was 1:2 and 1:4. The result showed that deoxygenation would work more effective at high temperature as indicated by higher CO and CO2 resulting from carboxylation and carbonylation. In addition, raising the reaction temperature from 300 to 400°C succeeded in increasing the diesel fraction of C16 - C20 by 33.01% and decreased the fraction of C21-C25 by 2.41%. Increasing water/ppo ratio did not give any significant improvement on green diesel products.
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