Table 1.
Box-Behnken design and observed experimental data for 3-level-3-factor response surface analysis.
| Treatment No. a | Experimental Variables | Observed Molar Conversion (%) | ||
|---|---|---|---|---|
| X1 (h) | X2 (PLU) | X3 (°C) | ||
| 1 | 16 | 500 | 80 | 85.7 ± 3.4 |
| 2 | 16 | 1000 | 70 | 92.4 ± 3.1 |
| 3 | 16 | 1000 | 70 | 92.0 ± 2.8 |
| 4 | 16 | 1000 | 70 | 91.7 ± 2.3 |
| 5 | 8 | 500 | 70 | 68.7 ± 4.1 |
| 6 | 24 | 500 | 70 | 82.3 ± 3.2 |
| 7 | 8 | 1500 | 70 | 80.4 ± 2.1 |
| 8 | 24 | 1500 | 70 | 98.8 ± 1.6 |
| 9 | 16 | 500 | 60 | 39.8 ± 2.7 |
| 10 | 8 | 1000 | 60 | 42.7 ± 3.3 |
| 11 | 16 | 1500 | 60 | 44.8 ± 4.2 |
| 12 | 16 | 1500 | 80 | 98.9 ± 2.5 |
| 13 | 24 | 1000 | 60 | 64.2 ± 2.1 |
| 14 | 8 | 1000 | 80 | 86.3 ± 2.8 |
| 15 | 24 | 1000 | 80 | 98.7 ± 1.9 |
a The treatments were run in a random order.