Water Vapor Adsorption in Kiln-Dried Red Oak

Authors

  • Minghui Zhang
  • Rado Gazo
  • Daniel Cassens
  • Jun Xie

Keywords:

Adsorption, model, red oak

Abstract

The moisture content of dried lumber fluctuates over time with temperature and relative humidity changes. While many studies have been conducted to investigate sorption equilibria, the overall sorption rate in wood from three directions at the same time has not been studied sufficiently. In this paper, the adsorption of moisture by small kiln-dried red oak samples over time at room temperature (21.1°C) and high relative humidity (80%) is studied. Also, a model is developed to predict the amount of water vapor adsorption over time for three dimensional kiln-dried red oak samples.

References

Alfery, T., E. F. Gurnee, and W. G. Lloyd. 1966. Diffusion in glassy polymers. J. Polym. Sci.C12:249-261.nBaronas, R., and F. Ivanauskas. 2002. Numerical investigation of moisture movement in porous solid using a diffusion model. 15th Nordic Seminar on Computational Mechanics, Aalborg, Denmark.nChristensen, G. N. 1960. Kinetics sorption of water vapor by wood. Austr. J. of Appl. Sci.11:294-304.nChristensen, G. N. and K. E. Kelsey. 1959. The rate of sorption of water vapor by wood. Holz Werkst.17:178-188.nComstock, G. L. 1963. Moisture diffusion coefficients in wood as calculated from adsorption, desorption, and steady state data. Forest Prod. J.13(3):97-103.nCrank, J. (1975). The mathematics of diffusion, Clarendon Press. 6 pp.nEckelman, C. A. 1998. The shrinking and swelling of wood and its effect on furniture. FNR 163. 26 pp.nHall, C. W. 1957. Drying farm crops. Agricultural Consulting Associates. Reynoldsburg, OH. Pp. 18-19.nLiu, J. Y., W. T. Simpson, and S. P. Verrill 2001. An inverse moisture diffusion algorithm for the determination of diffusion coefficient. Drying Technol.19(8):1555-1568.nNakano, T. 1994. Non-steady state water adsorption of wood Part I. A formulation for water adsorption. Wood Sci. Technol.28(5):359-363.nNakano, T. 1995. Note on a formulation of a water adsorption process of wood. Wood Sci. Technol.29(3):231-233.nNewman, A. B. 1931. The drying of porous solids: Diffusion calculations. Am. Inst. Chem. Eng.27:311-333.nSheppard, S. E., and P. T. Newsome. 1930. The sorption of water vapor by cellulose and derivatives. Part II. The kinetics of sorption. J. Phys. Chem.34(6):1158-1165.nSiau, J. F. 1995. Wood: Influence of moisture on physical properties. Dept. of Wood Science and Forest Products, VPI & SU, Blacksburg, VA. 219 pp.nSimpson, W. T. 1998. Equilibrium moisture content of wood in outdoor locations in the united states and worldwide. Research Note. FPL-NR-268. USDA Forest Serv., Forest Prod. Lab., Madison, WI. 11 pp.nSkarr, C. 1972. Water in wood. Syracuse University Press, Syracuse, NY. 218 pp.nSkarr, C. 1988. Wood-water relations, Springer-Verlag, Berlin, Heidelberg. 283 pp.nStamm, A. J. 1956. Diffusion of water into uncoated cello-phane. I. From rates of water vapor adsorption, and liquid water absorption. J. Phys. Chem.60(1):76-82.nStamm, A. J. 1959. Bound-water diffusion into wood in the fiber direction. Forest Prod. J.9(1):27-32.nStamm, A. J. 1960a. Bound-water diffusion into wood in across-the-fiber directions. Forest Prod. J.10(10):524-528.nStamm, A. J. 1960b. Combined bound-water and water-vapor diffusion into Sitka spruce. Forest Prod. J.10(12):644-648.nWadsö, L. 1994. Unsteady-state water vapor adsorption in wood: an experimental study. Wood Fiber Sci.26(1): 36-50.nWengert, E. M., and P. H. Mitchell. (1979). Psychrometric relationships and equilibrium moisture content of wood at temperatures below 212 0F. Symposium on Wood Moisture Content-Temperature and Humidity Relationships. Blacksburg, VA.nZhang, M., R. Gazo, and D. Cassens. 2006. Moisture distribution in a dried red oak lumber package stored in a high humidity environment. Forest Prod. J.56(4):75-80.n

Published

2007-09-27

Issue

Section

Research Contributions