SINTESIS GREEN DIESEL DARI VARIASI FEEDSTOCK DAN KATALIS DENGAN PROSES HIDROGENASI

Abstract

Kapok seed oil, jatropha seed oil, and CPO Off-grade are vegetable oils that cannot used as food ingredients, but have great potential biofuels such as green diesel which can be directly applied without the addition of diesel. Making green diesel consists of pretreatment of raw materials and synthesis of green diesel. The purpose of this research is to make green diesel from three raw materials and variation of catalysts CoMo/ɣ-Al 2 O 3 and NiMo/ɣ-Al 2 O 3 used hydrogenation process that fulfill SNI Biodiesel. Making green diesel starts with giving initial pressure of 30 bar, temperature of 300 o C for the reaction stage 1 for 1 hour, and 400ºC for stage 2 for 1 hour in batch hydrogenation reactor of catalyst addition. The best green diesel results were obtained on CPO Off-grade using NiMo/ɣ-Al 2 O 3 catalyst with %yield of 96.4626%. The characterization results obtained that sulfur content, pour point, calorific value, GC-FID liquid, flash point, density, and cetane number fulfill the SNI biodiesel standard, but the kinematic viscosity value does not fulfill the SNI biodiesel standard.