Official Journal of the Japan Wood Research Society
Table 9 Chemical composition of untreated and thermally modified spruce and oak wood (%)
From: Impact of thermal modification on color and chemical changes of spruce and oak wood
Temperature (°C) | Extractives | Cellulose | Lignin | Holocellulose | Hemicelluloses |
|---|---|---|---|---|---|
Spruce | |||||
20 | 0.96 ± 0.08 | 46.70 ± 0.52 | 26.22 ± 0.02 | 75.71 ± 0.39 | 29.01 ± 0.14 |
160 | 1.73 ± 0.12 | 45.79 ± 0.02 | 26.96 ± 0.06 | 74.45 ± 0.62 | 28.66 ± 0.61 |
180 | 1.85 ± 0.10 | 48.16 ± 0.15 | 27.29 ± 0.09 | 73.54 ± 0.60 | 25.38 ± 0.75 |
210 | 2.68 ± 0.21 | 48.68 ± 0.29 | 28.55 ± 0.04 | 66.84 ± 0.96 | 18.16 ± 0.82 |
Oak | |||||
20 | 4.31 ± 0.06 | 47.93 ± 0.08 | 22.35 ± 0.17 | 74.92 ± 0.06 | 26.99 ± 0.02 |
160 | 6.55 ± 0.05 | 48.41 ± 0.21 | 22.92 ± 0.06 | 71.45 ± 0.13 | 23.05 ± 0.08 |
180 | 7.22 ± 0.10 | 49.61 ± 0.10 | 23.78 ± 0.14 | 69.30 ± 0.09 | 19.69 ± 0.01 |
210 | 9.87 ± 0.16 | 51.31 ± 0.12 | 26.47 ± 0.16 | 62.41 ± 0.18 | 11.11 ± 0.06 |