Table 2 Glucan and xylan recovery of the dry pretreatment in the helically agitated reactor
Pretreatment conditions | Cellulose content before pretreatment (%) | Xylan content before pretreatment (%) | Glucan recovery (%) | Xylan recovery (%) |
|---|---|---|---|---|
Raw corn stover | 37.15 ± 0.22 | 19.86 ± 0.56 | - | - |
Changing temperature | ||||
165°C , 2.5%, 3 minutes | 38.04 ± 2.04 | 8.57 ± 2.26 | 100.09 | 94.24 |
175°C , 2.5%, 3 minutes | 37.23 ± 0.75 | 5.28 ± 0.02 | 96.69 | 79.32 |
185°C , 2.5%, 3 minutes | 40.93 ± 0.06 | 2.93 ± 0.16 | 96.50 | 62.00 |
Changing acid usage | ||||
185°C, 1.5%, 3 minutes | 37.71 ± 1.07 | 6.48 ± 0.18 | 92.05 | 78.89 |
185°C, 2.0%, 3 minutes | 37.41 ± 0.06 | 4.16 ± 0.08 | 96.63 | 74.91 |
185°C, 2.5%, 3 minutes | 40.93 ± 0.06 | 2.93 ± 0.16 | 96.50 | 62.00 |
185°C, 3.0%, 3 minutes | 38.48 ± 0.40 | 2.52 ± 0.17 | 73.97 | 43.18 |
185°C, 3.5%, 3 minutes | 36.85 ± 1.25 | 1.79 ± 0.21 | 75.12 | 36.37 |
185°C, 4.0%, 3 minutes | 35.98 ± 1.10 | 1.05 ± 0.10 | 65.53 | 29.75 |
Changing residue time | ||||
185°C, 2.5%, 1 minute | 41.52 ± 5.88 | 4.06 ± 0.41 | 92.71 | 64.08 |
185°C, 2.5%, 3 minutes | 40.93 ± 0.06 | 2.93 ± 0.16 | 96.50 | 62.00 |
185°C, 2.5%, 5 minutes | 38.54 ± 1.88 | 2.93 ± 0.08 | 82.78 | 57.29 |
185°C, 2.5%, 10 minutes | 39.29 ± 0.75 | 2.21 ± 0.22 | 76.44 | 42.96 |
Changing agitation rate | ||||
185°C, 2.5%, 3 minutes, 10 rpm | 40.23 ± 2.59 | 3.00 ± 0.19 | 84.81 | 54.03 |
185°C, 2.5%, 3 minutes, 30 rpm | 38.41 ± 0.58 | 2.86 ± 0.87 | 93.20 | 64.19 |
185°C, 2.5%, 3 minutes, 50 rpm | 40.93 ± 0.06 | 2.93 ± 0.16 | 96.50 | 62.00 |