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Investigation of Carbonization Mechanism of Wood (II)  

Kwon, Sung-Min (College of Forest Sciences, Kangwon National University)
Kim, Nam-Hun (College of Forest Sciences, Kangwon National University)
Publication Information
Journal of the Korean Wood Science and Technology / v.35, no.3, 2007 , pp. 45-52 More about this Journal
Abstract
The anatomical characteristics of Quercus variabilis woods carbonized at 310 to $350^{\circ}C$ were examined with an optical and scanning electron microscopy, and an X-ray diffraction analysis. Dimensional change and weight loss were also investigated. Volume of wood samples decreased with increasing the carbonization temperature, and checks were developed along with radial direction. Vessel diameter in tangential direction showed higher shrinkage than that in radial direction. Weight loss of samples increased with increasing carbonization temperature. Especially, the weight loss rapidly increased at the temperature ranging from 330 to $340^{\circ}C$. SEM study presented that the cell walls of samples carbonized at below $320^{\circ}C$ showed the layering structure. However, it was revealed that the layering structure was disappeared at $330^{\circ}C$ and over and showed an amorphous-like structure without cell wall layering. Interestingly, the existence of cellulose crystalline substance at $340^{\circ}C$ was confirmed by X-ray diffraction analysis and it was not detected at $350^{\circ}C$. Consequently, it is considered that the critical temperature for carbonization of wood was around $350^{\circ}C$.
Keywords
carbonization; Quercus variabilis; charcoal; SEM; X-ray diffraction;
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Times Cited By KSCI : 3  (Citation Analysis)
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