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Qualidade de black pellets de finos de carvão vegetal produzidos com diferentes umidades e tempo de secagem
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Orientador(es)
Resumo(s)
Charcoal fines are co-products of the wood carbonization process, unwanted because they reduce
the gravimetric yield of the main product, charcoal. It can be produced due to the carbonization
process, during the storage and transport of charcoal. Pelletizing charcoal fines increases the
energy density of this material, producing a homogeneous fuel with lower moisture content,
enabling burning in equipment with high energy efficiency, in addition to desirable properties
in energy products such as high fixed carbon content and low moisture content. This study
evaluated the effect of moisture content and drying time on the production of black pellets from
charcoal fines bound with rice starch (Oryza sativa) on the physicochemical and mechanical
characteristics. Black pellets were produced using two proportions of water (10 or 20%) and a
drying time of 4 or 6 hours. Black pellets were evaluated for their proximate analysis, elemental
composition, moisture content, size, apparent density, calorific value and energy density. The
addition of water did not affect the content of volatile matter, ash, and fixed carbon, while the
treatment with addition of 20% water and four hours of drying showed a higher moisture content
(3.34%). The addition of water allowed for better heat conduction and particle arrangement,
producing pellets with a durability greater than 98%. The better arrangement promoted by the
addition of 20% water also increased the density of the pellets, resulting in greater energy
density. Black pellets can be considered an alternative for residential heating, with T3 treatment
(20% - 4h) with a high energy density and better performance in terms of desirable properties
for use and commercialization according to the standard EN 14961-6.
Descrição
Palavras-chave
Residential heating Bioenergy Charcoal residue
Contexto Educativo
Citação
Carvalho, F. B., Martins, C. C. N., Peres, L. C., Surdi, P. G., Lima, L. V. L., Zanuncio, A. J. V., Carneiro, A. de C. O., Castro, V. R. de, Araújo, S. de O., & Demuner, I. F. (2024). Quality of black pellets of charcoal fines produced with different moisture content and drying time. Revista Árvore, 48(1). https://doi.org/10.53661/1806- 9088202448263752. Retrieved from https://www.revistaarvore.ufv.br/rarv/article/view/263752
Editora
SIF / UFV