APPARENT DENSITY AND MECHANICAL STRENGTH OF CHARCOAL FROM RESIDUES OF PIPTADENIA SUAVEOLENS (MIQ.) AT DIFFERENT FINAL TEMPERATURE CARBONIZATION
06 - Charcoal
1 CARLOS VINICIUS VIEIRA DE SOUZA, 1 EDUARDO JÚNIOR MENEZES CARVALHO, 1 JESSICA SABRINA DA SILVA FERREIRA, 1 JULIANE DA SILVA SAMPAIO, 1 SILVINO MAGNO DE OLIVEIRA MOTA JUNIOR, 1 VICTOR HUGO PEREIRA MOUTINHO
1 UFOPA
The density of wood is an important property for the charcoal production, since the higher its density, the higher will be the mechanical strength of the charcoal produced. On other hand, it is important to emphasized that the specie has potential for the energy sector, once its present accelerated growth in the native forest. In this way, samples from the branch of the second bifurcation of three trees of Piptadenia suaveolens (Miq.) from native forest were obtained, and each analysis was performed in triplicate. The specimens were carbonized at three final carbonization temperature: 450, 600 and 750 ° C, with the heating rate of 1.67 ° C.min-1 and residence time of 30 minutes. For the strength of the charcoal, a universal mechanical test machine was performed, and after that the apparent density of the charcoal was determined following the norms recommended by the ASTM. Statistical analysis was performed in Software R using the Tukey test with a 0.05% error rate. The mechanical strength varied statistically, with 10.38MPa at 450 ° C and 19.87MPa at 750 ° C. For density, it did not present statistical differences, having average near to 0,433g / cm³. In view of these results, it is concluded that the residues of the studied species, which are mostly discarded, presents similar mechanical values, and sometimes even higher than Eucalyptus for the literature. According to the literature, the increase in resistance from 500 ° C is directly related to the release of volatiles associated with the modification of the quantity, size and shape of the porosity in the material, resulting in an increase of apparent relative density.
Keywords: energy of biomass; modulus of elasticity; physical properties
