Division 1.4 Symbols and abbreviations for the fuel composition
United Kingdom
| Referred to a fuel with chemical formula CHαOεNδSγ. | ||
| Referred to a fuel with chemical formula CHαOβSγNδ. | ||
| Attention should be paid to the different meaning of symbol β in the two emissions calculation sections: in section 2 it refers to a fuel having the chemical formula CHαSγNδOε (i.e. the formula CβHαSγNδOε where β = 1, assuming one carbon atom per molecule), while in section 3 it refers to the oxygen-to-carbon ratio with CHαOβSγNδ. Then β of section 3 corresponds to ε of section 2. | ||
| Mass fraction w accompanied by the symbol of the chemical component as a subscript. | ||
| Section 2f1 | Section 3f2 | Quantity |
|---|---|---|
| w C f3 | w C | Carbon content of fuel, mass fraction [g/g] or [% mass] |
| w H | w H | Hydrogen content of fuel, mass fraction [g/g] or [% mass] |
| w N | w N | Nitrogen content of fuel, mass fraction [g/g] or [% mass] |
| w O | w O | Oxygen content of fuel, mass fraction [g/g] or [% mass] |
| w S | w S | Sulphur content of fuel, mass fraction [g/g] or [% mass] |
| α | α | Atomic hydrogen-to-carbon ratio (H/C) |
| ε | β | Atomic oxygen-to-carbon ratio (O/C)f4 |
| γ | γ | Atomic sulphur-to-carbon ratio (S/C) |
| δ | δ | Atomic nitrogen-to-carbon ratio (N/C) |
Annotations
Footnotes
- f1
-
Referred to a fuel with chemical formula CHαOεNδSγ.
- f2
-
Referred to a fuel with chemical formula CHαOβSγNδ.
- f3
-
Mass fraction w accompanied by the symbol of the chemical component as a subscript.
- f4
-
Attention should be paid to the different meaning of symbol β in the two emissions calculation sections: in section 2 it refers to a fuel having the chemical formula CHαSγNδOε (i.e. the formula CβHαSγNδOε where β = 1, assuming one carbon atom per molecule), while in section 3 it refers to the oxygen-to-carbon ratio with CHαOβSγNδ. Then β of section 3 corresponds to ε of section 2.