Mechanism of Voc Release From High-Temperature Southern Pine Lumber Drying

Authors

  • Terrance E. Conners
  • Hui Yan
  • Sujit Banerjee

Keywords:

VOCs, kiln-drying, turpentine, pinene, Method 25A emissions

Abstract

Hydrocarbon (Method 25A) emissions from drying southern pine lumber have been measured in full-scale experiments. The mechanism proposed comprises three components: release of turpentine dissolved in the surface layer of water on the wood, water-mediated transport of turpentine from the interior of the wood to the surface, and evaporation of turpentine during the falling rate period. The result allows the total Method 25A release to be estimated without knowledge of the airflow through the kiln. Full-scale Method 25A emissions from lumber can be predicted from laboratory work on sawdust, indicating that the mechanism is independent of the type of furnish.

References

Anonymous. 1995. Method 25A—Determination of total gaseous organic concentration using a flame ionization analyzer, 40CFR Part 60, 870-872, August 1, 1995.nBanerjee, S. 2001. Mechanisms of terpene release during sawdust and flake drying. Holzforschung55(4):413-416.nConners, T. E., L. L. Ingram, W. Su, S. Banerjee, A. T. Dalton, M. C. Templeton, and S. V. Diehl. 2001. Seasonal variation in southern pine terpenes. Forest Prod. J.51(6):89-94.nOtwell, L. P. 2001. Georgia-Pacific Corporation, personal communication.nShmulsky, R. 2000a. Influence of lumber dimension on VOC emissions from kiln-drying loblolly pine lumber. Forest Prod. J.50(3):63-66.nShmulsky, R. 2000b. Influence of drying schedule on VOC emissions from kiln-drying loblolly pine lumber. Forest Prod. J.50(4):45-48.nShmulsky, R. 2000c. End grain influence on VOC emissions from kiln-drying loblolly pine. Forest Prod. J.50(5):21-23.nShmulsky, R., and L. L. Ingram Jr. 2000. Empirical prediction of VOC emissions from drying southern yellow pine lumber. Forest Prod. J.50(6):61-63.n

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Published

2007-06-05

Issue

Number 4 / October 2002

Section

Research Contributions

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