The bio-oil yields obtained in this study are lower than those
obtained in a CSBR with pine wood sawdust (75 wt.% at 500 C)
[20] due to the higher char yield. Furthermore, Fig. 2 shows that effect
of temperature on the distribution of product fractions is smaller
compared to the pyrolysis of sawdust. This fact is partially
explained by the lower devolatilization rate of RH char due to its
lower organic material content. Nevertheless, the main responsible
for this RH behavior lies in its physical texture; that is thin layers
composed of cellulose, hemicellulose and lignin. Hence, the devolatilization
rate of each particle will be extraordinarily high, without
diffusion limitations and favored by the high nitrogen flow in
the reaction environment of a CSBR technology for pyrolysis. Such
conditions promote the rapid devolatilization of this waste without
any intraparticle diffusion limitations, which gives way to high biooil
yields in the 400–600 C range.