4. Conclusions
Non-woody (Coconut fiber) and woody biomass (pine wood)
were upgraded to produce solid fuel biochar by low temperature
pyrolysis. The dehydration and decarboxylation reactions of biomass
had same preference for the biomass under pyrolysis conditions. All
the major ash forming metals were retained in the biochars during
biomass pyrolysis. The combustion of the biochars occurred in two
temperature zones and the main mass loss shifted to high temperature
zone with increasing pyrolysis temperature. Hemicellulose and
cellulose in coconut fiber and pine wood showed different decomposition
behaviors and consequently significant improvement of
combustion performances was observed after 300 C pyrolysis for
coconut fiber and 330 C for pine wood, respectively. The present
study shows that low temperature pyrolysis have promising potential
to produce solid fuel biochar from waste biomass.