Diffusion of dissolved oxygen in liquid-saturated Douglas fir sapwood
✍ Scribed by H. I. Huang; K. V. Sarkanen; L. N. Johanson
- Publisher
- Springer
- Year
- 1977
- Tongue
- English
- Weight
- 407 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0043-7719
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✦ Synopsis
Summaly. A technique was developed for the determination of the effective dissolved oxygen diffusivity in liquid-saturated softwood in a diffusion cell under ambient pressure. From the measurements in the temperature range 2 ~ to 50~ the activation energy of diffusion was found to be 4.6 kcal/mole. The diffusivity in summerwood is about one half of that in springwood. The diffusivity of dissolved oxygen tl~ough composite springwood and summerwood Myers was based upon samples of two Douglas fir sapwood blocks saturated with water. In the radial and tangential directions, diffusivity was 1.4 to 2.3 x lff --6 cm2/s, which is about 6 to 10 % that of dissolved oxygen diffusivity in water. The diffusivity in the longitudinal direction is about 5.5 times that in the other two directions.
The diffusivity of dissolved oxygen through liquor-saturated wood and the effect of delignification on oxygen diffusion were also determined.