Table 4 Chemical compositions of HPAC-pretreated poplar, expressed as percentage of DM
HPAC concentration | Treatment temperature (°C) | Severity factor | Glucan (%) | Xylan (%) | Acid insoluble lignin (%) | Acid soluble lignin (%) | Solids recovery (%) | Removal | ||
|---|---|---|---|---|---|---|---|---|---|---|
Glucan (%) | Xylan (%) | Lignin (%) | ||||||||
AC-pretreated poplar |  | – | 54.9 ± 0.4 | 6.7 ± 0.5 | 33.4 ± 0.5 | 2.2 ± 0.3 | – | – | – | – |
40% | 60 | 0.9 | 67.1 ± 1.4 | 8.4 ± 0.1 | 22.4 ± 0.2 | 0.4 ± 0.0 | 79.2 | 1.2 | 0.2 | 49.2 |
60% | 60 | 0.9 | 76.8 ± 0.2 | 9.6 ± 0.1 | 15.3 ± 0.1 | 0.3 ± 0.0 | 68.6 | 4.1 | 1.5 | 70.0 |
80% | 60 | 0.9 | 87.8 ± 0.2 | 9.2 ± 0.4 | 4.3 ± 0.1 | 0.1 ± 0.0 | 59.0 | 5.6 | 18.9 | 92.7 |
100% | 40 | 0.3 | 79.9 ± 0.5 | 9.1 ± 0.3 | 9.0 ± 0.1 | 0.2 ± 0.0 | 67.0 | 2.5 | 8.4 | 82.6 |
100% | 60 | 0.9 | 89.9 ± 0.1 | 9.2 ± 0.3 | 1.2 ± 0.0 | 0.1 ± 0.0 | 55.5 | 9.1 | 23.5 | 98.0 |
100% | 80 | 1.5 | 89.9 ± 0.6 | 9.6 ± 0.2 | 0.2 ± 0.0 | 0.1 ± 0.0 | 53.1 | 13.0 | 24.0 | 99.6 |