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Diesel fuel

Diesel fuel in general is any liquid fuel used in diesel engines, whose fuel ignition takes place, without spark, as a result of compression of the inlet air mixture and then injection of fuel. (Glow plugs help achieve high temperatures for combustion during engine startup in cold weather.) Diesel engines have found broad use as a result of higher thermodynamic and thus fuel efficiencies. This is particularly noted where diesel engines are run at part-load; as their air supply is not throttled as in a petrol engine, their efficiency still remains high.

The most common type of diesel fuel is a specific fractional distillate of petroleum fuel oil, but alternatives that are not derived from petroleum, such as biodiesel, biomass to liquid (BTL) or gas to liquid (GTL) diesel, are increasingly being developed and adopted. To distinguish these types, petroleum-derived diesel is increasingly called petrodiesel.Ultra-low-sulfur diesel (ULSD) is a standard for defining diesel fuel with substantially lowered sulfur contents. As of 2006, almost all of the petroleum-based diesel fuel available in UK, Europe and North America is of a ULSD type.

Diesel fuel STB 1658-2012

Intended for used in diesel engines. The diesel fuel quality meets the requirements of the European standard EN 590.

For use in the temperate climate conditions, the following grades of diesel motor fuel are offered:
Diesel fuel DT-L-K5, grade C – filterability temperature limit: -5°C max;
Diesel fuel DT-Z-K5, grade F – filterability temperature limit: -20°C max.
Other most important requirements and specifications are presented below.

 

Characteristic

Units

Minimum

Maximum

1. Cetane number

 

51,0

 

2. Cetane index

 

46,0

 

3. Density at 15° С

kg/m³

820,0

845,0

4. Polycyclic aromatic hydrocarbons

% (m/m)

-

8,0

5. Sulfur content

mg/kg

 

10,0

6. Flash point

°C

above 55

-

7. Carbon residue (on 10 % distillation residue)

% (m/m)

-

0,30

8. Ash content

% (m/m)

-

0,01

9. Water content

mg/kg

-

200

10. Total contamination

mg/kg

-

24

11. Copper strip corrosion (3 h at 50 oC)

rating

class 1

12. Oxidation stability

g/m3

-

25

13. Lubricity, corrected wear scar diameter (WSD 1.4) at 60°С

μm

-

460

14. Viscosity at 40 oC

mm2/s

2,00

4,50

15. Distillation:

 

 

 

% (V/V) recovered at 250°С

 

 

< 65

% (V/V) recovered at 350°С

 

85

 

95 % (V/V) recovered at

°C

 

360

For use in severe winter and arctic climates diesel fuel DT-Z-K5, class 2 and diesel fuel DT-A-K5, class 4 are offered:

Characteristic

Units

Minimum

Maximum

1. Cetane number:

DT-Z-K5, class 2

DT-A-K5, class 4

 

 

48,0

47,0

 

-

-

2. Cetane index:

DT-Z-K5, class 2

DT-A-K5, class 4

 

 

46,0

43,0

 

-

3. Density at 15 0C

kg/m3

800,0

840,0

4. Polycyclic aromatic hydrocarbons

 % (m/m)

8,0

5. Sulfur content

mg/kg

10

6. Flash point

оС

Above 55

7. Carbon residue (on 10 % distillation residue)

% (m/m)

0,30

8. Ash content

% (m/m)

0.01

9. Water content

mg/kg

200

10. Total contamination

mg/kg

24

11. Copper strip corrosion (3 h at 50 0С)

rating

class 1

12. Oxidation stability

g/m3

25

13. Lubricity, corrected wear scar diameter (WSD 1,4) at 60 0С

µm

460

14. Viscosity at 40 0С:

DT-Z-K5, class 2

DT-A-K5, class 4

mm2/s

 

1,50

1,20

 

4,00

4,00

15 Distillation: 

- % (V/V) recovered  at 180 0С

- % (V/V) recovered  at 340 0С

 

% (V/V)

% (V/V)

 

 

95

 

10

 

16. CFPP:

DT-Z-K5, class 2

DT-A-K5, class 4

оС

 

-

 

minus 32

minus 44

17. Cloud point:

DT-Z-K5, class 2

DT-A-K5, class 4

оС

 

-

 

minus 22

minus 34