Abstract
The influence of extractive content on the thermal stability and kinetic degradation of two wood species has been investigated using chemical analysis and thermogravimetry. Two wood species were studied: Pinus taeda and Eucalyptus grandis. Thermogravimetric results showed that higher extractive contents in the wood accelerate the degradation process and promote an increase in the conversion values at lower temperatures reducing the wood thermal stability. After removing the extractives from wood the thermal stability for both wood species increased. The results also demonstrated that prior information about the wood composition can be helpful to increase the range of industrial applications of wood.
Highlights
Wood is a complex material composed of cellulose, hemicellulose and lignin and contains minor organic components, such as lipids and extractives (Popescu et al 2011, Coloma et al 2015)
Adequate models to forecast pyrolysis products are necessary for power plant optimization and to better understand the behavior of engines fueled by pyrolysis products (Slopiecka et al 2012)
The thermal degradation of wood is influenced by its composition
Summary
Wood is a complex material composed of cellulose, hemicellulose and lignin and contains minor organic components, such as lipids and extractives (Popescu et al 2011, Coloma et al 2015). Extractives are a minor component in wood, generally their content varies between 2% and 5% (Shebani et al 2008) and they can cause several problems in industrial applications. Pitch can become entrained in the pulp causing quality defects in the finished product (Dorado et al 2000, Silvério et al 2008, Coloma et al 2015). It is important to distinguish the behavior of biomass components for a better understanding of the biomass pyrolysis
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