Official Journal of the Japan Wood Research Society
Table 4 Mass balance of chemical composition before and after combined treatment by superheated steam and hot air heat treatment
Major component of wood | Combined treatment by SHS | Hot air heat treatment | ||||||
|---|---|---|---|---|---|---|---|---|
Before treatment | After treatment | Before treatment | After treatment | |||||
Glucan | 30.4 kg | (37.5%) | 25.8 kg | (31.8%) | 29.3 kg | (33.8%) | 24.5 kg | (28.3%) |
Arabinan | 1.7 kg | (2.1%) | 0.0 kg | (0.0%) | 2.3 kg | (2.7%) | 0.2 kg | (0.2%) |
Galactan | 8.8 kg | (10.9%) | 0.2 kg | (0.3%) | 14.8 kg | (17.0%) | 1.6 kg | (1.9%) |
Xylan | 2.9 kg | (3.6%) | 0.9 kg | (1.1%) | 3.1 kg | (3.5%) | 0.9 kg | (1.0%) |
Mannan | 9.6 kg | (11.8%) | 2.9 kg | (3.6%) | 8.6 kg | (9.9%) | 3.1 kg | (3.5%) |
Klason lignin | 23.3 kg | (28.8%) | 41.1 kg | (50.8%) | 24.6 kg | (28.4%) | 38.7 kg | (44.6%) |
Acid soluble lignin | 0.3 kg | (0.4%) | 0.2 kg | (0.2%) | 0.3 kg | (0.3%) | 0.3 kg | (0.3%) |
Extractives | 4.0 kg | (4.9%) | 2.8 kg | (3.4%) | 3.8 kg | (4.4%) | 2.3 kg | (2.6%) |
Gas condensate | – | – | 0.6 kg | (0.8%) | – | – | – | – |
Liquid condensate | – | – | 0.4 kg | (0.5%) | – | – | – | – |
Mass loss | – | – | 6.1 kg | (7.5%) | – | – | 15.2 kg | (17.6%) |
Total | 81.0 kg | (100.0%) | 81.0 kg | (100.0%) | 86.8 kg | (100.0%) | 86.8 kg | (100.0%) |