Table 1.
Pretreatment performance in the static reactor and in the helically agitated reactor
| Pretreatment conditions | Cellulose conversion (%) |
Inhibitors in the pretreated CS (g/100 g DM) |
Sugars in the pretreated CS (g/100 g DM) |
|||||
|---|---|---|---|---|---|---|---|---|
| Furfural | 5-HMF | Acetate | Glucose | Xylose | O-Glu | O-Xyl | ||
| In helically agitated reactor |
|
|
|
|
|
|
|
|
| Case 1: 185°C, 2.0%, 3 minutes |
77.55 |
0.18 |
0.09 |
0.58 |
0.48 |
5.34 |
0.72 |
8.45 |
| Case 2: 185°C, 2.5%, 3 minutes |
87.11 |
0.63 |
0.17 |
0.81 |
1.01 |
10.20 |
1.10 |
2.84 |
| In no agitation reactor |
|
|
|
|
|
|
|
|
| Case 3: 190°C, 2.0%, 3 minutes |
72.10 |
0.50 |
0.25 |
0.77 |
0.88 |
5.58 |
2.27 |
7.55 |
| Case 4: 190°C, 2.5%, 3 minutes | 85.10 | 0.90 | 0.21 | 1.20 | 1.58 | 8.02 | 1.57 | 4.29 |
The data in the pretreatment conditions column indicate the pretreatment temperature, acid usage, and residual time, respectively. Experiments were carried out in duplicate and averaged to give the mean values. Enzymatic hydrolysis was carried out at 50°C, 15 FPU enzyme dosage, and 150 rpm agitation for 72 hours. 5-HMF, 5-hydroxymethylfurfural; CS, corn stover; DM, dry matter; FPU, filter paper unit; O-Glu, glucan oligomer; O-Xyl, xylan oligomer.