Table 5 Soybean biodiesel fuel properties
From: Piston bowl shape and biodiesel fuel effects on combustion and emission of diesel engines
Specification | Units | Test method | EN 14214 limits | Test results | |
|---|---|---|---|---|---|
Min. | Max. | ||||
Typical formula | Â | Â | Â | Â | C18.74H34.51O2 |
Average molecular weight | g/kmol | Â | Â | Â | 291.2 |
Lower heating value | MJ/kg | Â | Â | Â | 37.4 |
Density at 15 oC | kg/m3 | EN ISO 12185 | ـــــــــــ | 900 | 883.4 |
Flash point | oC | EN ISO 3679 | 120 | ـــــــــــ | 123 |
Sulfur content | mg/kg | EN ISO 20884 | ـــــــــــ | 10 | 1.3 |
Cetane index |  | EN ISO 5165 | 51 | ــــــــــــ | 54.1 |
Kinematic viscosity 40 oC | mm2/s | EN ISO 3104 | 3.5 | 5 | 4.512 |
Cold filter plugging point | oC | EN 116 | ــــــــــ | + 5 oC (summer) – 15 oC (winter) | – 18 |
Water content | mg/kg | EN ISO 12937 | ــــــــــــ | 500 | 357 |
Oxidation stability at 110 oC | Hours | EN 14112 | 6 | ـــــــــ | 7.1 |
Acid value | mg KOH/g | EN 14104 | ــــــــــــ | 0.5 | 0.36 |
Iodine value | g lodine/100 g | EN 14111 | ـــــــــ | 120 | 115 |
Methanol content | wt% | EN 14110 | ــــــــــــ | 0.2 | 0.11 |
Free glycerin | wt% | EN 14111 | ــــــــــ | 0.02 | 0.01 |
Monoglyceride content | wt% | EN 14105 | ــــــــــــ | 0.8 | 0.5 |
Diglyceride content | wt% | EN 14105 | 2 | 0.2 | 0.12 |
Triglyceride content | wt% | EN 14105 | ــــــــــ | 0.2 | 0.16 |