Biodiesel Quality Norms


Jatropha biodiesel conforms to European quality norms

Jatropha oil is more or less similar to rape seed oil in its fatty acid composition and is hence well suited for conversion into biodiesel by conventional, proven processes. The slightly higher concentration of unsaturated fatty acids in Jatropha oil compared with rapeseed oil means that special care must be taken to ensure sufficient oxidation stability for Jatropha biodiesel. The following table shows that Jatropha biodiesel conforms to or exceeds the properties specified in European standard EN 14214.

Properties of jatropha oil methyl ester (biodiesel) compared to European standards

PropertyMethodUnitJatropha biodieselEN 14214 standard
Appearanceclear, brown
Density @ 15°CISO 3675kg/m3884.2860-900
Solid contaminationmg/kg2< 24
Neutralisation numberDIN 51 558-1mg KOH/g0.11< 0.5
Copper corrosionEN ISO 2160grade11
Oxidation stabilityprEN 14112Hour6.7> 6
Viscosity at 40°CISO 3104Mm2/s4.43.5-5.0
Iodine numberDIN 53241-1-gJ2/100g93< 120
AshISO 3987g/100 g< 0.01< 0.02
Water contentEN ISO 12937mg/kg< 500< 500
Flash pointDIN EN 22719°C172>101
Cetane number-58,5>51
MonoglycerideEN 14 105g/100g0.01< 0.8
DiglycerideEN 14 105g/100g0.02< 0,2
TriglycerideEN 14 105g/100g< 0.02< 0.2
Free glycerineEN 14 105g/100g< 0.02< 0.2
Total glycerineEN 14 105g/100g0.03< 0.25
MethanolprEN 14110g/100g< 0.02< 0.2
Ester contentprEN 14103g/100g98.9Not specified
Sodiummg/kg< 0.5< 0.5
Potassiummg/kg< 0.5Na+ Ka
Phosphorusmg/kg< 1 < 10
Higher calorific valueMJ/kg41.3Not specified
Lower calorific valueMJ/kg38.9Not specified
Oxygen content %11.2Not specified

Data taken from Mandpe et al., 2005 (Mandpe, S., Kadlaskar, S., Degen, W. and Keppeler, S., 2005. On road Testing of Advanced Common Rail Diesel Vehicles with Biodiesel from the Jatrophacurcas plants, Paper No. 2005 – 26-356. Paper presented at International Mobility Engineering Congress and Expo 2005, 23-25 October 2005, Chennai Trade Centre, Nandambakkam, Chennai organised by SAE India