Table 2 Physicochemical properties and fatty acid composition of CIO and WCO
Properties | Waste cooking oil | Calophyllum inophyllum oil | Mixture of WCO and CIO (50–50%) |
|---|---|---|---|
Acid value = (mg of KOH g− 1 of oil) | 0.25 | 65 | 33.4 |
Density at 27 °C (kg m− 3) | 918 | 929 | 922 |
Kinematic viscosity at 40 °C (mm2 s−1) | 26.0 | 59.3 | 40.6 |
Saponification value (mg of KOH g−1) | 193 | 382 | 292 |
Palmitic acid (%) | 10.1 | 22.3 | 17.1 |
Oleic acid (%) | 84.6 | 55.0 | 57.3 |
Linoleic acid (%) | – | 17.0 | 15.5 |
Stearic acid (%) | – | 4.4 | 4.2 |
Others (%) | 5.3 | 1.4 | 6.0 |