Table 2.
Design of experiments of continuous esterification process FFA reduction.
| Run | M (vol%) | C (vol%) | Di (mm) | De (mm) | S (rpm) | FFA (wt%) |
|---|---|---|---|---|---|---|
| 1 | 17.5 | 2.5 | 5 | 6 | 3000 | 2.199 |
| 2 | 17.5 | 2.5 | 5 | 6 | 3000 | 2.118 |
| 3 | 17.5 | 2.5 | 5 | 6 | 3000 | 2.130 |
| 4 | 17.5 | 2.5 | 5 | 6 | 3000 | 2.162 |
| 5 | 2.5 | 2.5 | 5 | 6 | 3000 | 2.895 |
| 6 | 17.5 | 0.5 | 5 | 6 | 3000 | 0.656 |
| 7 | 17.5 | 4.5 | 5 | 6 | 3000 | 0.176 |
| 8 | 17.5 | 2.5 | 5 | 6 | 1000 | 2.461 |
| 9 | 17.5 | 2.5 | 5 | 6 | 5000 | 1.718 |
| 10 | 32.5 | 2.5 | 5 | 6 | 3000 | 1.419 |
| 11 | 17.5 | 2.5 | 5 | 2 | 3000 | 0.129 |
| 12 | 17.5 | 2.5 | 5 | 10 | 3000 | 0.235 |
| 13 | 25.0 | 1.5 | 4 | 4 | 2000 | 0.704 |
| 14 | 10.0 | 1.5 | 4 | 4 | 4000 | 0.573 |
| 15 | 10.0 | 3.5 | 4 | 4 | 2000 | 0.015 |
| 16 | 25.0 | 3.5 | 4 | 4 | 4000 | 0.027 |
| 17 | 25.0 | 3.5 | 4 | 8 | 2000 | 0.053 |
| 18 | 10.0 | 1.5 | 4 | 8 | 2000 | 0.029 |
| 19 | 10.0 | 3.5 | 4 | 8 | 4000 | 0.853 |
| 20 | 25.0 | 1.5 | 4 | 8 | 4000 | 0.740 |
| 21 | 25.0 | 3.5 | 6 | 4 | 2000 | 0.692 |
| 22 | 10.0 | 1.5 | 6 | 4 | 2000 | 1.536 |
| 23 | 10.0 | 3.5 | 6 | 4 | 4000 | 2.118 |
| 24 | 25.0 | 1.5 | 6 | 4 | 4000 | 0.311 |
| 25 | 10.0 | 3.5 | 6 | 8 | 2000 | 0.855 |
| 26 | 25.0 | 3.5 | 6 | 8 | 4000 | 0.260 |
| 27 | 10.0 | 1.5 | 6 | 8 | 4000 | 2.639 |
| 28 | 25.0 | 1.5 | 6 | 8 | 2000 | 0.049 |
| 29 | 17.5 | 2.5 | 3 | 6 | 3000 | 0.008 |
| 30 | 17.5 | 2.5 | 7 | 6 | 3000 | 1.062 |
Note: Di is diameter of hole, De is depth of hole, M is methanol, C is sulfuric acid, S is speed of rotor, FFA is free fatty acid, and 25 L/hr of MCPO flow rate was fixed in all experiments.