Avaliação do potencial energético dos resíduos madeireiros de duas espécies vegetais beneficiadas no município de Itacoatiara-AM

Abstract

The present study aimed to analyze the energy potential of sawdust from species of the genus Manilkara (maçaranduba) and genus Dipteryx (cumarú) produced in the municipality of Itacoatiara/AM, through proximate analysis, elemental composition, higher and lower calorific values. Samples used were collected in a wood industry in the municipality. Moisture content were obtained after oven drying. The ash, volatile materials and fixed carbon contents were obtained by gravimetry after combustion. Particle size analysis was performed using the sieving method, applying the linearized forms of the Gates-Gaudin-Schumann (GGS), Rosin-Rammler-Bennett (RRB), and Log-Normal (LN) models to describe the particle size distribution. Elemental composition, the higher and lower calorific values were calculated using literature correlations from proximate analysis data. Maçaranduba exhibited high volatile material content (80.64%), low ash content (0.08%), and a high carbon concentration (49.35%), resulting in a higher heating value (HHV) of 19.39 MJ/kg. On the other hand, cumarú presented a high content of volatile materials (79.78%) and ash (10.84%), which resulted in a lower higher heating value (HHV) of 15.84 MJ/kg compared to maçaranduba and other amazonian species, despite its high carbon concentration (41.14%). The energy potential analysis confirmed that the residues of maçaranduba and cumarú are suitable for use in combustion processes, such as energy cogeneration.