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/m3
765–800
766
773
Flash Point
°C
55 (min)
58
63
Viscosity at 40°C
mm2/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.