Research Article
Optimization of Sunflower Oil Transesterification Process Using Sodium Methoxide
Table 1
The matrix of central composite design (CCD) resulted from response surface methodology design of experiment.
| Treatment run | Blocks | Time of reaction (, min) | Excess stoichiometric amount of alcohol to oil (, w/w%) | Catalyst amount (, w/w%) |
| 1c | 2 | 120 | 75 | 0.5 | 2 | 2 | 150 | 50 | 0.3 | 3 | 2 | 90 | 100 | 0.3 | 4c | 2 | 120 | 75 | 0.5 | 5 | 2 | 90 | 50 | 0.7 | 6 | 2 | 150 | 100 | 0.7 | 7c | 1 | 120 | 75 | 0.5 | 8 | 1 | 150 | 50 | 0.7 | 9 | 1 | 150 | 100 | 0.3 | 10 | 1 | 90 | 50 | 0.3 | 11c | 1 | 120 | 75 | 0.5 | 12 | 1 | 90 | 100 | 0.7 | 13 | 3 | 120 | 25 | 0.5 | 14c | 3 | 120 | 75 | 0.5 | 15 | 3 | 60 | 75 | 0.5 | 16 | 3 | 120 | 125 | 0.5 | 17 | 3 | 120 | 75 | 0.9 | 18 | 3 | 180 | 75 | 0.5 | 19 | 3 | 120 | 75 | 0.1 | 20c | 3 | 120 | 75 | 0.5 |
Opt. point* | — | 60 | 25 | 0.5 |
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cCenter point.
*The optimum point was resulted from the optimization procedure.
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