# Commission Delegated Regulation (EU) 2017/654 of 19 December 2016 supplementing Regulation (EU) 2016/1628 of the European Parliament and of the Council with regard to technical and general requirements relating to emission limits and type-approval for internal combustion engines for non-road mobile machinery, Division 3.3.3: Fuel properties

Extent: E+W+S+N.I.

The general chemical formula of fuel is CH α O β S γ N δ with α atomic hydrogen-to-carbon ratio (H/C), β atomic oxygen-to-carbon ratio (O/C), γ atomic sulphur-to-carbon ratio (S/C) and δ atomic nitrogen-to-carbon ratio (N/C). Based on this formula the carbon mass fraction of fuel w C can be calculated. In case of diesel fuel the simple formula CH α O β may be used. Default values for fuel composition may be derived from Table 7.3:
Table 7.3
Default values of atomic hydrogen-to-carbon ratio, α, atomic oxygen-to-carbon ratio, β, atomic sulphur-to-carbon ratio, γ, atomic nitrogen-to-carbon ratio, δ, and carbon mass fraction of fuel, w C for reference fuels
Fuel
Atomic hydrogen, oxygen, sulphur and nitrogen-to-carbon ratiosCHαOβSγNδ
Carbon mass concentration, w C[g/g]
Diesel (non-road gas-oil)
CH1,80O0S0N0
0,869
Ethanol for dedicated compression ignition engines (ED95)
CH2,92O0,46S0N0
0,538
Petrol (E10)
CH1,92O0,03S0N0
0,833
Petrol (E0)
CH1,85O0S0N0
0,866
Ethanol (E85)
CH2,73O0,36S0N0
0,576
LPG
CH2,64O0S0N0
0,819
Natural Gas/Biomethane
CH3,78O0,016S0N0
0,747

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Source: https://www.legislation.gov.uk/eur/2017/654/annex/VII/division/3/division/3.3/division/3.3.3 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-654/annex-VII/division-3/division-3.3/division-3.3.3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.