Enhanced Green Diesel Production from Hydrotreating of Used Cooking Oil via In-Situ Hydrogen Generated from Ethanol
DOI:
https://doi.org/10.36257/jieetech.v3i2.11020Keywords:
Green Diesel, Hydrotreating, Ethanol In-Situ, Yield, Cooking OilAbstract
Used cooking oil has great potential as a raw material in the production of renewable fuels, particularly green diesel. This study aims to increase the yield of green diesel from used cooking oil through an in-situ ethanol hydrotreating process using a NiMo/γ-Al₂O₃ catalyst. This process utilizes ethanol as an internal hydrogen donor (in-situ) to replace the need for external hydrogen in the hydrodeoxygenation process. The variables studied include ethanol concentration (5%, 10%, and 15%) and reactor temperature (340°C, 370°C, 400°C, 430°C, and 460°C). Product characteristics were analyzed through density tests, kinematic viscosity, flash point, cetane number, and GC-MS. The results showed that the optimal conditions were achieved at an ethanol concentration of 15% and a temperature of 460°C, yielding 60.025% green diesel, a density of 763.197 kg/m³, a viscosity of 2.682 mm²/s, and a flash point of 61°C. However, the cetane number obtained was still below the minimum SNI standard of 70. This process demonstrates significant potential for converting oil waste into environmentally friendly fuel, while also supporting the reduction of dependence on fossil fuels.
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Copyright (c) 2025 Putri Mutmainnah, Erdalia Chantika; Egin; Ahmad Zikri, Nurul Kholidah; Rima Daniar; Ida Febriana
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