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SEBU8430-02
Sour Gases
Table 14
Description
Lower calorific value
Maximum variation of LCV
Minimum methane content
Total Sulfur compounds ex-
pressed as H
S
2
Total halide compounds ex-
pressed as CL
Ammonia
Dust
Oil vapors
Silicon
Maximum humidity (relative)
Min/max. gas pressure 4006TRS
and 4008TRS engines
Min/max. gas pressure 4006TRS
and 4008TRS engines with Elek-
tra and 4016TRS
Maximum fluctuation in gas
pressure
Min/max. gas temperature
Sour gases are the following:
• Landfill gas
• Digester gas
• Bio gas
• Mine gas
The gas specification requirements are to be used as
a guide only. Perkins require a full gas analysis to be
supplied at the inquiry stage of an engine order.
Engine rating depends on the low calorific value of
the fuel and may be adapted to suit the specifics of
the fuel.
Requirements for the use of Sour Gas
Designation
LCV
-
CH
4
S + H
S + SO
+ SO
2
2
3
CL + FL + I + Br
NH
3
3 - 10 micrometers
C
5
Si
-
-
-
-
-
Value
>15 MJ/Nm
3
<±10 percent
>35 vol-percent
<35 mg/MJ
<19 mg/MJ
<2.81 mg/MJ
<1 mg/MJ
<1.19 mg/MJ
<0.56 mg/MJ
<80 percent
15 to 50 mbar
50 to 250 mbar
3 mbar
10° to 50°C (50° to 122°F)
Total possible derate is calculated by adding
individual derate for:
• Charge cooler water inlet temperature
• Altitude
• Ambient temperature
• Lower calorific value
• Methane number
• Volumetric considerations
Maintenance Section
Fuel Specification
Remarks
Derate may be required
During operation
Derate may be required
Sulfur compounds are those that
contain sulfur. The total sulfur
level must account for all sulfur
in the fuel and can be expressed
as the equivalent of H
S
2
Halide compounds are those that
contain chlorine, fluorine, iodine,
or bromine. Total halide levels
must take into account all halides
and be expressed as the equiva-
lent chlorine.
-
-
No condensation in gas train and
inlet manifold allowed
Lubricating oil analysis to show a
metal content of <15 mg/kg of oil
At lowest inlet temperature, no
condensation in inlet manifold
and gas train allowed
At inlet to air fuel ratio regulator
At inlet to air fuel ratio regulator
Maximum rate of change of gas
pressure is 3 mbar/min, variation
frequency < 5/h
-
47
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