Data/hora: 06/06/2024 11:57:00

Biblioteca(s): | Embrapa Florestas.
Data corrente: | 09/08/2016
Data da última atualização: | 14/09/2021
Autoria: | ROSSI, T.; MOURA, L. F. de; TORQUATO, P. R.; BRITO, J. O.
Título: | Effect of extractive removal on the calorific value of Brazilian woods residues.
Ano de publicação: | 2013
Fonte/Imprenta: | Journal of Chemistry and Chemical Engineering, v. 7, n. 4, p. 340-343, Apr. 2013.
Idioma: | Inglês
Conteúdo: | In wood processing, the production of residues is an unavoidable aspect to be considered. The use of wood residues is gaining importance due to the large amount generated and improper disposal, which can seriously harm environment. Burning of wood residues to energy generation is an increasingly usual practice. However, wood residues hold chemical substances that could be recovered before burning. These substances are the wood extractives, which may have many uses as natural dyes for fabrics, foods and cosmetics, as well as potential medicines. Thus, it is of great interest to study the effect of extractive removal on the calorific value of wood residues. In this work, the calorific value of three Brazilian wood species commonly used in sawmills (hymenaeacourbaril, jatoba; cedrelingacatenaeformis, cedroarana; tabebuiasp, ipe) and residues of urban trees pruning (caesalpiniaechinata, Brazil wood) were evaluated before and after extraction in hot water. In woods studied, the calorific value showed three patterns of behavior after removal of extractives soluble in hot water. For Brazil wood, the removal of extractives caused no significant change in calorific value. For cedroarana and jatoba, extractive removal led to a decrease in wood calorific value of 161.3 kcal·kg-1 and 40.1 kcal·kg-1, respectively, which indicates that the extractives from these species have a positive energy potential. Finally, for ipe, the removal of extractives resulted in an increase in calorific value of wood (67.6 kcal·kg-1), which might encourage the recovery of extractives from wood residues before burning for energy generation.
Palavras-Chave: | Calorific value; Extrativos de madeira; Poder calorífico.
Thesagro: | Madeira; Resíduo.
Thesaurus Nal: | Waste management; Wood extractives; Wood residues.
Categoria do assunto: | W Química e Física
Registro original: | Embrapa Florestas (CNPF)
Exemplares: | CNPF - (55184-1) - ADD - AP - DD -  -  -  - DIS