Table 1 Composition of the extracted straw
From: Reinforcement of the bio-gas conversion from pyrolysis of wheat straw by hot caustic pre-extraction
Percent yield of the components % | Raw material | Pretreatment NaOH loading (w/w dry straw) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
6% | 14% | 22% | ||||||||
1 h | 2 h | 3 h | 1 h | 2 h | 3 h | 1 h | 2 h | 3 h | ||
Ash | 7.05 | 6.73 | 6.31 | 5.24 | 5.45 | 5.22 | 5.13 | 4.05 | 4.39 | 4.82 |
Cellulose | 41.72 | 43.35 | 43.45 | 44.50 | 41.08 | 42.18 | 43.64 | 40.89 | 40.62 | 40.21 |
Pentosan | 23.15 | 20.04 | 18.09 | 16.11 | 15.23 | 13.33 | 12.74 | 12.33 | 11.13 | 8.21 |
Klason lignin | 21.42 | 19.70 | 18.32 | 15.69 | 10.00 | 9.72 | 8.73 | 7.92 | 5.31 | 4.82 |
Acid-soluble lignin | 2.15 | 2.06 | 1.75 | 1.27 | 1.38 | 1.13 | 1.02 | 1.14 | 1.06 | 0.99 |
Residual yield | 100 | 97.05 | 92.86 | 87.47 | 76.90 | 75.50 | 73.94 | 67.86 | 62.85 | 58.28 |