Calorific values of solid, liquid and gaseous fuels 3.11.4



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3.11.4 Calorific values of solid, liquid and gaseous fuels

By custom the basic calorific value for solid and liquid fuels is the gross calorific value at constant volume and for gaseous fuels it is the gross calorific value at constant pressure. The word ‘gross’ here signifies that the water formed and liberated during combustion is in the liquid phase. The values given are approximate because many of the substances listed are not well defined. The calorific values of pure substances can be calculated from information in Section 3.10. More detailed information on technical fuels can be found in J. W. Rose and J. R. Cooper (eds) (1977) Technical Data on Fuel, 7th edn, British National Committee, World Energy Conference, London.

Calorific values of solid, liquid and gaseous fuels

Solid and liquid fuels	Gross calorific value/ MJ kg⁻¹
Alcohols Ethanol	30
Methanol	23

Coal and coal products Anthracite (4% water)	36
Coal tar fuels	36–41
General purpose coal (5–10% water)	32–42
High-volatile coking coals (4% water)	35
Low temperature coke (15% water)	26
Medium-volatile coking coal (1% water)	37
Steam coal (1% water)	36

Peat Peat (20% water)	16

Petroleum and petroleum products Diesel fuel	46
Gas oil	46
Heavy fuel oil	43
Kerosine	47
Light distillate	48
Light fuel oil	44
Medium fuel oil	43
Petrol	44.8–46.9

Wood Wood (15% water)	16

Gaseous fuels at 15 °C, 101.325 kPa, dry	Gross calorific value/MJ m^− 3
Coal gas coke oven (debenzolized)	20
Coal gas continuous vertical retort (steaming)	18
Coal gas low temperature	34
Commercial butane	118
Commercial propane	94
North Sea gas natural	39
Producer gas coal	6
Producer gas coke	5
Water gas carburetted	19
Water gas blue	11

E.F.G. Herington




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