Table 3 Confirmation of the predicted optimum condition with the experimental results
NaOH (%) | Ethanol (%) | Temperature (°C) | Time (h) | Released pCA (%) | Recovered xylan in residues (%) | ||
|---|---|---|---|---|---|---|---|
Predicted values | Actual values | Predicted values | Actual values | ||||
Pith | |||||||
 1.63 | 70 | 66.0 | 3.18 | 94.59 | 94.07 | 77.28 | 76.85 |
 1.72 | 70 | 63.4 | 2.29 | 94.00 | 94.22 | 76.20 | 76.01 |
 1.51 | 70 | 65.2 | 3.30 | 92.63 | 91.76 | 77.69 | 76.32 |
Rind | |||||||
 1.90 | 70 | 69.8 | 1.00 | 98.99 | 97.24 | 88.73 | 88.46 |
 1.80 | 70 | 62.1 | 1.50 | 97.28 | 97.05 | 87.56 | 86.47 |
 1.55 | 70 | 68.8 | 1.95 | 96.00 | 94.74 | 86.79 | 84.99 |
Whole stem | |||||||
 1.46 | 70 | 70.0 | 2.19 | 95.13 | 95.05 | 85.35 | 85.04 |
 1.52 | 70 | 70.0 | 2.00 | 95.90 | 94.77 | 83.68 | 82.96 |
 1.39 | 70 | 70.0 | 3.00 | 92.07 | 92.31 | 82.85 | 82.12 |