Table 4.
Physical properties of diesel, Jatropha vegetable oil and Jatropha biodiesel (Data sourced from56).
| Properties | ASTM method | Diesel | jatropha oil | Jatropha biodiesel | Pentanol |
|---|---|---|---|---|---|
| Density at 20 °C, kg/m3 | D1298 | 840 | 940 | 874 | 814 |
| Kinematic viscosity at 40 °C, cSt | D445 | 2.84 | 24.5 | 4.34 | 2.88 |
| Heating value, kJ/kg | D240 | 44,705 | 38,650 | 42,673 | 35,164 |
| Flash point, °C | D93 | 68 | 225 | 130 | 33 |
| Cetane number | D613 | 48 | 38 | 53 | 20 |
| Iodine value, gI2/100 g | D1959 | 0.15 | 97.2 | 0.26 | – |
| Carbon residue (%) | D524 | 0.12 | 1.0 | 0.25 | – |
| C/H ratio (by vol) | D5291 | 6.52 | 6.54 | 6.93 | 4.96 |
| Acid value, mg KOH/g | D974 | – | 3.83 | 0.40 | – |
| Elemental analysis (%wt) | |||||
| C (%) | 80.12 | 76.99 | 82.22 | 68.12 | |
| H (%) | 12.2 | 11.77 | 11.96 | 13.72 | |
| O (%) | 1.21 | 10.58 | 5.74 | 18.15 | |
| N (%) | 1.68 | 0.66 | 0.041 | – | |
| S (%) | 4.79 | – | 0.038 | – | |