Abstract

Environmental hazardous waste engine oil (WEO) is utilized to derive eco-fuel to fulfill the global energy demand. Microwave-assisted pyrolysis (MAP) is an energy-efficient, ecofriendly technology to obtain the high saturated hydrogen-rich liquid fuels from the WEO. Compared to electrical pyrolysis, the pyrolysis temperature was achieved 5% faster, and it consumed 55% higher energy in the MAP. Catalytic pyrolysis (microwave absorber) is potentially a promising method to improve fuel quality. SiC has been recognized as a microwave catalyst to increase the process efficiency and fuel quality of the MAP. Catalytic MAP consumed 38% less energy and attained the pyrolysis temperature 71% faster than electrical pyrolysis. The highest yield of pyrolysis oil (76%) and saturated hydrocarbons (74%) was observed in the catalytic MAP at pyrolysis temperature 350–400°C. The pyrolysis oil subfractions were categorized by GC-MS and the physicochemical characterization was found using ASTM D975-17. The calorific value of microwave pyrolysis oil (MPO) was 2% higher than diesel fuel because of its higher lower carbon chain length. The result shows that significant properties of MPO match with diesel fuel. Hence, MPO can be the best alternative fuel for diesel engine.

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