Bio-oil is the main product fraction in the whole range of temperatures
studied and its yield peaks at 450 C. Gas yield is very
low at temperatures below 500 C (lower than 6 wt.%) and increases
to 10 wt.% when pyrolysis temperature is raised to
600 C, since secondary cracking of pyrolysis vapors is enhanced.
The drop in char yield becomes more pronounced between 400
and 450 C, i.e., it decreases from 32 to 25 wt.%.