Emission Characteristics of VOCs in Drying Process for Plywood Manufacturing

합판 제조용 목재 건조공정에서의 휘발성 유기화합물(VOCs) 배출특성

  • Jang, Jeong-Gook (Department of Environmental Engineering, Dongseo University) ;
  • Kim, Mi-Ran (Department of Environmental Engineering, Pukyong National University)
  • Published : 2008.12.31


Emission characteristics of volatile organic compounds (VOCs) were investigated in the flue gas emitted from wood drying process for plywood manufacturing. The moisture content of raw timber was average 48%, and its density was $831.55kg/m^3$. But the moisture content of dried wood is needed less than around 10%, thus the moisture contents of flue gas should be remarkably high(about 18.2 V/V%). Therefore, the vapor in flue gas is equivalent to 320 ton-vapor/day when 1100 ton-wood/day is treated in the wood drying process. The temperature of flue gas ranges from $140^{\circ}C\;to\;150^{\circ}C$ in each dryer stack with exception of the input site of wood(about $110^{\circ}C$). The velocity of flue gas in each stack ranges from 1.7 to 9.7m/sec. In order to assess the concentrations and attribution rate of odorous compounds, it was analyzed about 40 VOCs in the flue gases. It was found that the major odorous compounds were 8 compounds, and the concentrations of major VOCs(ppm) were as follows; benzene: $0.054{\sim}0.052$, toluene: $1.011{\sim}2.547$, ethylbenzene: $0.472{\sim}2.023$, m,p-xylene: $0.504{\sim}3.245$, styrene: $0.015{\sim}0.148$, o-xylene : $0.271{\sim}1.097$, ethanol: $11.2{\sim}32.5$, ${\alpha}$-pinene: $0.908{\sim}10.578$, ${\beta}$-pinene: $0.982{\sim}14.278$. The attribution rate of terpenes (${\alpha}$-pinene, ${\beta}$-pinene) was about 60.56%, and that of aromatics and alcohols was about 22.77%, and 16.67%, respectively. It is suggested that the adequate control device should be used to control both the water soluble and non-soluble compounds because both compounds were mixed in flue gas.


  1. Bowyer J. M., Shmulsky R., Haygreen J. G., 2002, Forest products and wood science: an introduction, Iowa State Press, 554pp
  2. 정희석, 2005, 최선목재건조학, 서울대학교 출판부, 481pp
  3. 정희석, 2000, 목재의 특수건조, 서울대학교 출판부, 380pp
  4. Dinwoodie J. M., 2000, Timber: Its nature and behaviour, 2nd ed., E & FN Spon, 272pp
  5. Walker J. C. F., 1993, Primary wood processing: Principles and practice, Chapman & Hall, 612pp
  6. Tsoumis G, 1991, Science and technology of wood: Structure, properties, utilization., Chapman & Hall, 400pp
  7. 환경부, 2003, 대기오염공정시험방법, 111pp
  8. 유미선, 양성봉, 안성주, 2002, 흡착열탈착 장치와 GC/MS를 이용한 휘발성 유기화합물의 분석과 악취원인성분의 예측, 분석과학, 15(1), 80-86
  9. 환경부 대기보전국, 2007, 악취관리업무편람, 299pp
  10. Nagata Y., Takeuchi N., 1990, Measurement of Odor Threshold by Triangle Odor Bag Method, Bulletin of Japan Environmental Sanitation Center, 17, 77-89
  11. Iwasaki Y., Ishiguro T., 1978, Measurement of odor by triangle odor bag method (I), Journal of Japan Society for Atmospheric Environment, 13(6), 34-39
  12. Leonardos G., Kendall D., Barnard N., 1969, Odor threshold determination of 53 odorant chemicals, J. of APCA., 19(2), 91-95
  13. Hellman T. M., Small F. H., 1974, Characterization of the odor properties of 101 petrochemicals using sensory method, J. of APCA., 24(10), 979-982
  14. Dean J. A., 1979, Lange's Handbook of Chemistry, 12th ed., McGraw-Hill, New York, 7.54pp

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