• Journal of the Korean Wood Science and Technology
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• v.35 no.3
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• pp.53-60
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• 2007

Carbon content, properties of micro-pore, and chemical properties of the charcoal prepared from wood powder, wood fiber, and bark of Abies sibirica Ledeb at different temperatures were investigated. The yield of charcoal decreased with increasing the carbonization temperature. The yield of bark charcoal was higher than those of wood and wood fiber charcoal. The content ratio of carbon atom in the charcoal increased with increasing the carbonization temperature, whereas those of hydrogen and oxygen atom were decreased. Ash content of bark charcoal was also higher than those of wood and wood fiber charcoal. The specific surface area of wood and wood fiber charcoal was greater than that of bark charcoal. In all charcoal, the specific surface area and the volume of micro-pore were highest when the carbonization temperature was $600^{\circ}C$, however they tended to decrease when the temperature was reached to $800^{\circ}C$. For the functionality test of chemical groups on the charcoal surface, adsorption test have performed against acidic (HCl) and basic chemicals (NaOH, $Na_2CO_3$, and $NaHCO_3$). As carbonization temperature increased, adsorption amount of HCl increased, while adsorption amounts of NaOH, $Na_2CO_3$, and $NaHCO_3$ were decreased. The charcoal prepared at higher temperature showed basic properties, while the charcoals manufactured at lower temperature presented acidic properties. Therefore, it was considered that the carbonization temperature affected the pH of charcoal.