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

Table 7

Properties of the GTL diesel fuel in comparison with the recently accepted CEN TS 15940: 2012 specifications.

Property	Unit	Paraffinic diesel specification	Summer GTL diesel	Winter GTL diesel
		(Class A)
Cetane Number		70 (min)	80	71
Density at 15°C	kg/m^3	765–800	766	773
Flash Point	°C	55 (min)	58	63
Viscosity at 40°C	mm^2/s	2.00–4.50	2.19	2.30
Lubricity, corrected wear scar diameter at 60°C	micron	460 (max)	367^#	548^**
FAME content	vol%	7% max	0	0
Total Aromatics Content	% (v/v)	1.0 (max)	<0.1	0.01
Sulphur content	ppm	5 (max)	<1	1.5
Carbon residue (on 10% distillation residue)	mass%	0.3 (max)	0.06	0.04
Ash content	mass%	0.01 (max)	<0.01	<0.01
Water Content	ppm	200 (max)	50	ND
Total contamination	ppm	24 (max)	2	1
Copper strip corrosion (3 h at 50°C)	rating	Class 1	1b	1b
Oxidation stability	h	20 (min)	>20
CP	°C	EN590	−7	>20
CFPP	°C	EN590	−9	−45
PP	°C	NS^*	−14	−45
Acid number	gKOH/g	NS^*	0.01	0.001
Distillation (v/v recovered at 95%)	°C	360 (max)	347	353.2

NS: no specification available.
^*NM: not measured.
^**No lubricity additive added.
^#Additised with lubricity improver additive.