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Depletion of fossil fuel reserves and environmental issue have led to the development of biofuels. Plant derived oil, such as palm oil, has been claimed as one of the promising source of renewable energy. However, high oxygen content in palm oil makes it unsuitable to be directly used as fuel. In the present study, the performance of Ni/ZSM-5, Mo/ZSM-5 and NiMo/ZSM-5 catalysts was investigated in catalytic cracking of used vegetable oil (UVO) into green fuel. The catalytic cracking reactions were carried out in a fixed bed reactor at 4 hour(WHSV), continuously for 3 hours. Conversions of the two major fatty acids: palmitic acid (84.72%) and stearic acid (74.10%) were found highest at 350 °C with Mo/ZSM-5. The optimum palmitic acid and stearic acid conversion with Mo/ZSM-5 were found at 400 °C. Comparison study was also done with Pd/Al2O3 at 400 °C for its performance in catalytic cracking of UVO. Similar conversion for palmitic acid was obtained for Mo/ZSM-5 (84.72%) and Pd/Al2O3 (86.37%) at steady state. However, system with Mo/ZSM-5 as catalyst approached steady state earlier at 60 mins compared to that of Pd/Al2O3 at 120 minutes.

CATALYTIC CRACKING OF USED VEGETABLE OIL TO GREEN FUEL WITH METAL FUNCTIONALIZED ZSM-5 CATALYSTS