Directive 2005/55/EC of the European Parliament and of the Council of 28 September 2005 on the approximation of the laws of the Member States relating to the measures to be taken against the emission of gaseous and particulate pollutants from compression-ignition engines for use in vehicles, and the emission of gaseous pollutants from positive-ignition engines fuelled with natural gas or liquefied petroleum gas for use in vehicles (Text with EEA relevance) (repealed)
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Status:
This is the original version (as it was originally adopted).
2.NATURAL GAS (NG)
European market fuels are available in two ranges:
the H range, whose extreme reference fuels are GR and G23;
the L range, whose extreme reference fuels are G23 and G25.
The characteristics of GR, G23 and G25 reference fuels are summarised below:
Reference fuel GR
|
|
Characteristics | Units | Basis | Limits | Test method |
---|
Minimum | Maximum |
---|
Composition: | | | | | |
Methane | | 87 | 84 | 89 | |
Ethane | | 13 | 11 | 15 | |
Balance | %-mole | — | — | 1 | ISO 6974 |
Sulphur content | mg/m3 | — | — | 10 | ISO 6326-5 |
Reference fuel G23
|
|
Characteristics | Units | Basis | Limits | Test method |
---|
Minimum | Maximum |
---|
Composition: | | | | | |
Methane | | 92,5 | 91,5 | 93,5 | |
Balance | %-mole | — | — | 1 | ISO 6974 |
N2 | | 7,5 | 6,5 | 8,5 | |
Sulphur content | mg/m3 | — | — | 10 | ISO 6326-5 |
Reference fuel G25
|
|
Characteristics | Units | Basis | Limits | Test method |
---|
Minimum | Maximum |
---|
Composition: | | | | | |
Methane | | 86 | 84 | 88 | |
Balance | %-mole | — | — | 1 | ISO 6974 |
N2 | | 14 | 12 | 16 | |
Sulphur content | mg/m3 | — | — | 10 | ISO 6326-5 |
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