Table 2 Variables factors considered for transesterification of T. peruviana oil to biodiesel
Variable | Symbol | Coded factor levels | ||
|---|---|---|---|---|
| Â | Â | -1 | 0 | +1 |
Catalyst amount (g) | X1 | 2.00 | 4.00 | 6.00 |
Reaction time (min) | X2 | 50 | 60 | 70 |
Methanol/oil ratio (v/v) | X3 | 0.10 | 0.15 | 0.20 |