| Independent Variables | Range and Level | ||
| Lower Limit (−1) | 0 | Upper Limit (1) | |
| Time (hrs) (×1) | 24 | 72 | 120 |
| Inhibitor Concentration (g/L) (×2) | 0.001 | 0.002 | 0.003 |
| Temperature (K) (×3) | 303 | 318 | 333 |