Journal of Applied Chemistry / 2016 / Article / Tab 3

Research Article

Tribological Performance of Si-Doped Hydrogenated Diamond-Like Carbon Coatings in Different Biodiesel

Table 3

Selected results from biodiesel analyses according to DIN EN 14214:12-11.

Feature Limits acc. standardsRME
w/o OS
RME
200 mg/kg OS
RME
1000 mg/kg OS
SME
w/o OS
SME
200 mg/kg OS
SME
1000 mg/kg OS

Ester content96,5%>99%>99%>99%98,1%98,1%98,1%
Total glyceride contentmax. 0.25%0.1%0.1%0.1%0.2%0.2%0.2%
Sulphur contentmax. 10 mg/kg<5 mg/kg<5 mg/kg<5 mg/kg<5 mg/kg<5 mg/kg<5 mg/kg
Cetane indexmin. 51.052.552.552.557.157.157.1
Water content500 mg/kg64 mg/kg64 mg/kg64 mg/kg127 mg/kg127 mg/kg127 mg/kg
Copper corrosion1111111
Oxidation stabilitymin. 8 h7.3 h12.5 h24.5 h4.5 h6.4 h12.5 h
Acid numbermax. 0.5 mg KOH/g0.49 mg KOH/g0.49 mg KOH/g0.49 mg KOH/g0.271 mg KOH/g0.217 mg KOH/g0.217 mg KOH/g

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