Seleção de espécie, temperatura e tempo de carbonização na produção de carvão vegetal com resíduos madeireiros da Amazônia

Forestry activities in the Amazon generate large amounts of waste, from logging process, with carbonization being a potential alternative to mitigate this liability. However, the diversity of species and the lack of information on ideal carbonization parameters make the operation of the ovens difficult. In this research, the effects of the species and carbonization parameters on energy quality in the conversion of wood industry residues into charcoal are evaluated. The study material came from the municipality of Paragominas, Para, collecting samples of the three most commercialized species, Handroanthus serratifolius (Vahl) S.O., Hymenolobium petraeum Ducke and Enterolobium schomburgkii (Benth.) Benth. The carbonizations were carried out in a muffle furnace, with temperatures of 500 °C and 600 °C and a final level of 30 min and 60 min. The species and temperature parameters were those that had a significant effect, exerting the greatest influence on the production and quality of charcoal. The time at the final level of carbonization did not show any influence on the variables. The increase in temperature caused a reduction in gravimetric yield. The wood residues of the three species showed high quality characteristics for the production of charcoal.