Rape oil is also used as an additive to diesel oil or, if unprocessed, as a fuel itself (systems for feeding engines with rape oil heat it to facilitate its flow and circulation in the injection and fuel systems). It is also used as a raw material for the production of biodiesel, i.e. a biofuel usually used for Diesel engines. The latter is not pure rape oil, since it is chemically processed (to the form of fatty acid esters). Biodiesel can be used alone or as an additive to ordinary diesel oils, most often in the amount of several (3-5) per cent.
RAW RAPE OIL
| Parameter determined: | Parameters compliant with PN-A-86908 |
|---|---|
| Phosphorus content, ppm | max. 20 (PN-88/A-85930) |
| Free fatty acids % | max. 0,2 (PN-EN ISO 660:2005) |
| Impurities % | max. 0,2 (PN-EH ISO 663:2004) |
| Water % | max. 0,2 (PN-EH ISO 12397:2005) |
| Iodine value, gram I2/100 gram | max. 120 (PN-EN ISO 3961:2006) |
| Saponification value, mg KOH/1gram | 180 - 195 (PN-EN ISO 3657:2004) |
| Peroxide value, meq O2/kg | max. 5 (PN-EN ISO 3960:1996) |
| Soap content, ppm | max. 50 (PN-EN ISO 10539:2002) |
| Flash point, °C | min. 120 (PN-EN ISO 2719:2007) |
| Erucic acid content, % | max. 2 |
| Sulphur content, ppm | max. 10 |
| Hexane content, ppm | max. 100 |
| Density (20°C), g/cm3 | 0,910 - 0,920 |