Carlos Miguel Simões da Silva

ENERGY PROPERTIES OF WOOD PARTICLES TORREFIED AT DIFFERENT TEMPERATURES

1 Received on 02.09.2014 accepted for publication on 11.11.2016. 2 Universidade Federal de Viçosa, Programa de Pós-Graduação em Ciência Florestal, Viçosa, Minas Gerais, Brasil. E-mail: <karmiguel@yahoo.com.br> and <mateusmagalhaes91@gmail.com>. 3 Universidade Federal de Viçosa, Departamento de Engenharia Florestal, Viçosa, Minas Gerais, Brasil. . E-mail: <bvital@ufv.br> and <cassiacarneiro@ufv.br>. 4 Universidade Federal de Mato Grosso, Faculdade de Engenharia Florestal, Mato Grosso, Brasil. E-mail: <aylsoncosta@gmail.com>. 5 Universidade de Lisboa, Centro de Estudos Florestais, Lisboa, Portugal. E-mail: <solangeeoa@yahoo.com.br>. *Corresponding author.

POTENCIAL DA MADEIRA DE Pterogyne nitens Tul. (MADEIRA-NOVA) PARA PRODUÇÃO DE CARVÃO VEGETAL

The low diversity of forest tree species used in the formation of planted forests in Brazil, based mainly on Eucalyptus and Pinus genus, has led to study of alternative woods that show good productive potential. Thus, Pterogyne nitens species (madeira-nova), which shows good growth in Brazils northeast region, it has aroused interest despite little research on their technological characteristics. The objective of this study was to analyze the potential of Pterogyne nitens wood for the charcoal production. Nine-year-old timbers were harvested in Vitoria da Conquista town, Bahia state. The woods were fragmented and carbonized in a muffle furnace with electric heating and final temperatures of 300°C, 450°C and, 600°C. Analysis were performed of carbonization process (yield in charcoal, condensable gases and non-condensable gases), apparent density (0% moisture), friability, superior heating power and, immediate chemistry of charcoal. Based on the results, it could be concluded that the fixed carbon and superior heating value of produced charcoal increased with the increasing of the final carbonization temperature. On the other hand, the increasing of the final carbonization temperature caused a reduction in the content of volatile materials and charcoal yield. The yield of non-condensable gases and friability of charcoal increased with the elevation of final carbonization temperatures from 300oC to 450oC, remaining constant to higher temperatures. Finally, the final carbonization temperature of 450°C was considered optimal for carbonization of that studied wood.

ESTIMATES OF MASS AND ENERGY OF DIFFERENT GENETIC MATERIAL EUCALYPTUS

1 Received on 20.10.2013 accepted for publication on 09.11.2016. 2 Universidade Federal de Viçosa, Programa de Pós-Graduação em Ciência Florestal. E-mail: <mateusmagalhaes91@gmail.com>, <karmiguel@yahoo.com.br>, <mourasouzam@gmail.com> and <l.freitasfialho@gmail.com>. 3 Univercidade Federal de Viçosa, Departamento de Engenharia Florestal. E-mail: <cassiacarneiro@ufv.br> and <bvital@ufv.br>. *Corresponding author.