Extractives and energetic properties of wood and charcoal

Revista Árvore

Antônio José Vinha Zanuncio²  Amélia Guimarães Carvalho²  Paulo Fernando Trugilho¹  Thiago Campos Monteiro¹ 

[1] ,Universidade Federal de Viçosa Programa de Pós graduação em Ciência Florestal ,Brasil

关键词: Gross calorific value;    Eucalyptus;    Gravimetric yield;    Eucalyptus;    Poder calorífico;    Rendimento gravimétrico;   

DOI  :  10.1590/S0100-67622014000200018

来源: SciELO

【 摘 要 】

Charcoal production stands out as a raw material for the production of renewable energy. To assess wood quality in energy terms, studies have focused more on the holocellulose and lignin content than on the role of extractives. The objective of this study was to evaluate the relationship between the extractive content in cold water, in dichloromethane and total on energy properties of wood and charcoal, from six trees species. The extractives were removed with different solvents to be recorded and gross calorific value of wood was determined. The wood was carbonized at 1.67°C/min heating rate until maximum of 450°C and residence time of 30 min. The extractive content was correlated with the gravimetric yield, apparent relative density, ash, volatile matter, fixed carbon and gross calorific value of charcoal. The removal of total extractives and extractives soluble in dichloromethane reduced the gross calorific value of wood of most species evaluated. The extractives removed in cold water did not correlate with the parameters of carbonization. The extractives content in dichloromethane correlated with volatile matter, fixed carbon and gross calorific value. Total extractive content correlated with gravimetric yield, apparent relative density and gross calorific value of charcoal.

【 授权许可】

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