Table 3 Experimental range and levels of the independent variables in terms of actual and coded factors in the optimization of conditions of hydrolysis reaction
Independent variable | Symbol | Level | ||
|---|---|---|---|---|
−1 | 0 | 1 | ||
Water material ratio | X 1 | 8 | 10 | 12 |
Hydrolysis temperature | X 2 | 35 | 40 | 45 |
Pretreatment temperature (°C) | X 3 | 100 | 110 | 120 |
Pretreatment time | X 4 | 5 | 10 | 15 |