PODER CALORÍFICO DA MADEIRA DE Eucalyptus grandis E DA Hevea brasiliensis

Abstract

RESUMOA biomassa é todo o material orgânico que, quando queimado, libera alguma forma de energia. Para utilização da biomassa é necessário conhecer o seu poder calorífico que está diretamente relacionada com o teor de umidade no combustível. O objetivo deste estudo é determinar o poder calorifico superior das espécies de Eucalyptus grandis e Hevea brasiliensis, visando conhecer seu potencial energético. Foi determinado o teor de umidade pelo método gravimétrico e poder calorifico superior através de uma bomba calorimétrica Ika. Os resultados do teor de umidade foram satisfatórios em comparação com os recomendados pela NBR 14929 (2003), DIN 51731 e ÖNORM M7135. O poder calorífico superior foi considerado adequado comparando com os encontrados na literatura, por conseguinte, estes materiais mostraram ter um bom potencial energético, podendo ser utilizados para queima, como biomassa ou na produção de pellets.Palavras-chave: Biomassa, Potencial energético, Poder calorifico Superior. WOOD CALORIFIC POWER FROM Eucalyptus grandis AND Hevea brasiliensis SPECIES ABSTRACTBiomass is all organic material, which when burned, releases some form of energy. In order to characterize biomass burning is becomes necessary to know its calorific value that is directly related to the moisture content on the fuel. The objective of this study is to determine the high heating value from particles of the species Eucalyptus grandis and Hevea brasiliensis, aiming to know its energy potential. To accomplish this it was determined the moisture content by gravimetric method, and the high heating value was determined by an isothermal calorimeter Ika bomb. The results for moisture content were satisfactory compared with those recommended by the NBR 14929 (2003), DIN 51731 and ÖNORM M7135, and as the high heating calorific value was considered appropriate and for what it is worth greater than the usual values found in literature, therefore this material has proved to have a good power potential and can be used for burning, and also on power generation.

Utilization of pequi Residual Biomass from the Brazilian cerrado for obtaining raw and activated biochars and bio-oil

“…The biochar of the pequi sample did not show satisfactory values of surface area (BET and Langmuir) and micropore size (Table 3) when compared with activated carbon from other biomasses. According to the guidelines for the certification of the biochar (European Biochar Certificate version 4.8), the minimum specific surface area required is >150 m 2 /g [39]. In the present study, the minimum value required by the standard was not reached.…”

Wood quality of ten clonal progenies of rubber tree as raw material for bioenergy

“…However, Muzel et al (2014) reported Brazilian forest species that presented higher HHV and were, therefore, widely used for energy generation, as noted by the author above. Studying the wood of clones of Eucalyptus grandis and H. brasiliensis, Telmo and Lousada (2011) reported HHV of 17895 kJ•kg -1 and 17897 kJ•kg -1 .…”