Table 2.
Central Composite Design (CCD) experimental design and results of the response surface.
| Run | Factor A, Temperature (°C) | Factor B, pressure (bar) | Factor C, Hydrogen (bar) | Response, Y, Polymer conversion (%) (Experimental result) |
|---|---|---|---|---|
| 1 | 70 | 20 | 10 | 3.10 |
| 2 | 70 | 20 | 2 | 5.20 |
| 3 | 75 | 20 | 6 | 4.53 |
| 4 | 80 | 20 | 10 | 3.32 |
| 5 | 80 | 20 | 2 | 5.40 |
| 6 | 75 | 25 | 10 | 3.86 |
| 7 | 70 | 25 | 6 | 5.00 |
| 8 | 75 | 25 | 6 | 5.20 |
| 9 | 75 | 25 | 6 | 5.20 |
| 10 | 75 | 25 | 6 | 5.21 |
| 11 | 75 | 25 | 6 | 5.20 |
| 12 | 75 | 25 | 6 | 5.21 |
| 13 | 75 | 25 | 6 | 5.19 |
| 14 | 75 | 25 | 2 | 5.82 |
| 15 | 80 | 25 | 6 | 5.10 |
| 16 | 70 | 30 | 2 | 5.38 |
| 17 | 70 | 30 | 10 | 3.10 |
| 18 | 75 | 30 | 6 | 5.00 |
| 19 | 80 | 30 | 2 | 5.68 |
| 20 | 80 | 30 | 10 | 3.57 |