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공석우,김병로 한국목재공학회 2002 목재공학 Vol.30 No.4
본 연구는 한국산 주요 수종의 간벌재 및 목질재료 탄화물의 흡착 특성과 기본적인 성질과의 관계를 검토하였다. 탄화온도가 높아지고, 탄화시간이 길어짐에 따라 국산 간벌재 탄화물의 메틸렌블루 흡착량(MBA)이 증가하는 경향을 보였지만, 탄화온도 600℃에서 최고치를 보이는 목재 수종도 있었다. 수종간 MBA에는 큰 차이가 있었는데 가장 큰 값은 잣나무 탄화물(134 ㎡/g)이였고, 가장 작은 값은 굴참나무 탄화물(34 ㎡/g)이였다. 또한 침엽수재는 활엽수재보다 높은 MBA를 나타냈으며, MBA와 탄화전 간벌재의 기건비중과는 부의 상관성을 나타냈다. 목질재료 탄화물의 MBA도 탄화온도가 높아지고, 탄화시간이 길어짐에 따라 증가하는 경향을 보였고, 목질재료간 MBA의 차이는 크지 않았다. 목질재료 탄화물의 MBA는 간벌재 탄화물에 비해 낮은 수준을 나타내는 것으로 드러났다. 탄화온도가 높아지고, 탄화시간이 길어짐에 따라 간벌재 및 목질재료 탄화물의 비표면적, 총 세공용적은 증가하는 경향을 보였고, 탄화온도 600℃에서 MBA의 최고치를 보인 수종은 비표면적도 같은 온도에서 최고치를 나타냈다. MBA와 비표면적 및 총 세공용적간에는 정의 상관을 보였다. 목질재료 탄화물에는 주로 미세 세공이 발달하는 것으로 밝혀졌다. This research was to investigate the adsorption characteristics of charcoals of major Korean wood species (thinned trees) and wood-based materials. As carbonization time and temperature increased, methylene-blue adsorption (MBA) of charcoals of thinned trees and wood-based materials increased. Pinus koraiensis charcoal showed the highest MBA. MBA of softwoods was higher than that of hardwoods. There was a negative correlation between air-dried specific gravity before carbonization and MBA of carbonized thinned trees. The MBA of wood-based materials showed similar value, but wood-based materials in MBA was lower than thinned woods. Surface area and total pore volume of thinned trees and wood-based materials increased as carbonization temperature increased. The species showing highest MBA appeared to have the highest surface area at the carbonization temperature of 600℃ as well. There was a positive correlation between surface area, total pore volume and MBA of charcoals. The charcoal of wood-based materials generally exhibited micro pores.
미이용 목질폐잔재의 탄화 이용개발 (1) : 수종의 간벌재 탄화와 탄화물의 특성 Carbonization and It's Properties of Thinned Trees
김병로,공석우 한국목재공학회 1999 목재공학 Vol.27 No.2
Objective of this research is to obtain fundamental data of carbonized wood wastes for soil condition, de-ordorization, absorption of water, carrier for microbial activity, and purifying agent for water quality of river. The carbonization technique and the properties of carbonized wood wastes(thinned trees) are analyzed. Proximate analysis shows the thinned wood contains 0.22-0.73% ash, 77-80% volatile matter, and 10-14% fixed carbon. The charcoal yield decreases and the shrinkage rate increases as the carbonization temperature and time increase. The charcoal yields of Larix leptolepis, Pinus rigida and Pinus densiflora are high, wheras those of Pinus koraiensis and Quercus variabilis are low. The shrinkage rate by carbonization has same trend as water removal of wood. The specific gravity after the carbonization decreases about 50% comparing to green wood. The charcoal has 0.89-4.08% ash, 6.31-13.79% volatile matter, and 73.9-83.5% fixed carbon. As the carbonization temperature and time increase, pH of charcoal increases. When the carbonization temperature is 400℃, pH is about 7.5. When the temperature is between 600 to 800℃, pH is about 10 with small difference. The water-retention capacity is not affected by the carbonization temperature and time. The water-retention capacity within 24hr is about 2.5 - 3times of sample weight, and the equivalent moisture content becomes 2-10% after 24 hr.