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Official Journal of the Japan Wood Research Society

Journal of Wood Science Cover Image

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
  1. Data represent mean ± standard deviation