Pyrolysis generates a dark liquid referred to as pyrolysis oil, a artificial gas identified as syngas, and also a solid residue known as biochar. Most of these components can be used for energy. pure - with out qualification; utilised informally as (normally pejorative) intensifiers; "an arrant fool"; "a whole coward"; https://purebiofuelwoodpellets77530.onzeblog.com/38485094/indicators-on-biofuel-burner-you-should-know