Table 3.
Characterization of raw materials
| Feedstock | Density (g/cm3) | Kinematic viscosity (mm2/s) a | Acid value (mgKOH/goil) | FFA content (wt%) b | Water content (ppm) | Triglyceride content (wt%) |
|---|---|---|---|---|---|---|
| Soybean oil | 0.93 | 18.38 | 0.13 | 0.07 | 626 | 97.70 |
| Waste Frying oil | 0.94 | 20.48 | 0.21 | 0.11 | 671 | 95.73 |
| Jatropha excisa oil | 0.92 | 15.75 | 1.55 | 0.78 | 980 | 94.60 |
| Acid oil from soybean soapstock | 0.96 | 10.94 | 153.72 | 76.91 | 5221 | 9.18 |
| Pork Fat | 0.90 | 21.85 | 0.67 | 0.33 | 590 | 97.64 |
a At 60 °C (reaction temperature)
b Calculated from the acid value (EN 14104: 2003) and expressed as oleic acid [62]