A Comparison of the Stability Performance of Blends of Paraffinic Diesel and Petroleum-Derived Diesel, with RME Biodiesel Using Laboratory Stability Measurement Techniques

Table 8

Properties of the RME biodiesel used in the current study.

Property	Unit	EN 14214 specification	RME
Cetane number		51 min	60.6
Density at 15°C	kg/m^3	860–900	879
Flash Point	°C	120 (min)	161
Viscosity at 40°C	mm^2/s	3.5–5.0	4.53
Lubricity, corrected wear scar diameter at 60°C	micron		NM^*
FAME content	% (mol/mol)	96.5 (min)	100.0
Sulphur content	mg/kg	10.0 max	2
Carbon residue (on 10% distillation residue)	% (mol/mol)	0.30 max	0.09
Sulfated ash content	% (mol/mol)	0.02 max	<0.01
Water content	mg/kg	500 max	158
Total contamination	mg/kg	24 max	16.5
Copper strip corrosion (3 h at 50°C)	rating	1	1b
Oxidation stability, 110°C	h	6.0 min	6.64
CP	°C		−4
CFPP	°C		−13
PP	°C		−11
Acid value	mg KOH/g	0.50 max	0.12
value (Br number)	g Br/100 g	120 max	58
Group I metals (Na + K)		5 max	<1
Group II metals (Ca + Mg)		5 max	<1
Linolenic acid content	% (m/m)	12.0 max	8.30
Methanol content	% (m/m)	0.20 max	0.02
Monoglyceride content	% (m/m)	0.80 max	0.53
Diglyceride content	% (m/m)	0.20 max	0.14
Triglyceride content	% (m/m)	0.20 max	0.08
Free glycerol	% (m/m)	0.020 max	0.01
Total glycerol	% (m/m)	0.25 max	0.17

NM: not measured.