Fuel Specifications – Us Natural Gas - Kohler SFGLD480 Operation & Maintenance Manual

1. ANALYSIS OF FUEL GAS
For the characterization of the gas to be used as a fuel, it will be necessary to carry out a chemical analysis of the
same. Such an analysis will be made first in order to select the type of engine required and to check the gas
conformity with the specifications for its use as an engine fuel. Additionally, gas analysis shall be conducted
whenever harmful constituents are suspected to be present in the gas as well as from time to time as part of the
installation monitoring.
Below are the basic parameters of the fuel gas which need be checked, according to the gas origin.
1.1. NATURAL GAS
Natural gas consists in a mixture of light hydrocarbons and inert constituents. It is of mineral origin. Its
composition will be determined by analyzing at least the following parameters:
1. Description of the place where the analysis is conducted (within an installation or at a location)
2. Date/time of sampling
3. Date/time of analysis
4. Analysis procedures employed
5. Gas temperature and pressure
6. CH concentration (Vol %)
4
7. C H concentration (Vol %)
2 6
8. C H concentration (Vol %)
3 8
9. C H concentration (Vol %)
4 10
10. C H concentration (Vol %)
5 12
11. +C concentration (Vol %)
6
12. CO concentration (Vol %)
2
13. N concentration (Vol %)
2
14. O concentration (Vol %)
2
15. CO concentration (Vol %)
16. H concentration (Vol %)
2
17. H S concentration (ppm or mg/m
2
18. Gas relative humidity (%)
As a general rule, the above elements are the usual constituents of natural gas and their measurement is by gas
chromatography. However, where there are doubts about the total gas composition, it will be necessary to check
additionally for the presence of the following compounds:
19. Halides concentration (ppm or mg/m
20. Siloxanes concentration (mg/m
21. NH concentration (ppm or mg/m
3
22. BTEX concentration (ppm or mg/m
23. Oils and tar concentration (mg/m
24. Solid particles concentration (mg/m
PRODUCT INFORMATION
IC-G-D-30-021e
FUEL SPECIFICATIONS – US NATURAL GAS
3
)
n
3
)
n
3
): at least TMOH, TMS, L2, L3, L4, D3, D4, D5
n
3
)
n
3
)
n
3
)
n
3
)
n
4.1.19
INDEX DATE
B
May 2014
O&M_2.002211.810_A_10_2016
Dep. 8
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