Pyrolysis oil may refer to:

• Pyrolysis oil - synthetic liquid fuel (bio-oil) produced by biomass pyrolysis
• Shale oil - synthetic liquid fuel produced by oil shale processing
• Synthetic fuel - any synthetic fuel produced by pyrolysis
• Coal oil - specific oil shale oil used for illuminating purposes
• Biomass to liquid - producing synthetic hydrocarbon fuels from biomass via a thermochemical route

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