Chemical compositions of some common gaseous fuels:

Chemical compositions of some common gaseous fuels are indicated in the table below:

Composition (%)
Fuel	Carbon Dioxide (CO2)	Carbon Monoxide (CO)	Methane (CH4)	Butane (C4H10)	Ethane (C2H6)	Propane (C3H8)	Hydrogen (H2)	Hydrogen Sulfide (H2S)	Oxygen (O2)	Nitrogen (N2)
Carbon Monoxide		100
Coal Gas	3.8	28.4	0.2				17.0			50.6
Coke Oven Gas	2.0	5.5	32				51.9		0.3	4.8
Digester Gas	30		64				0.7	0.8		2.0
Hydrogen							100
Landfill Gas	47	0.1	47				0.1	0.01	0.8	3.7
Natural Gas	0 - 0.8	0 - 0.45	82 - 93		0 - 15.8		0-1.8	0 - 0.18	0 - 0.35	0.5 - 8.4
Propane Gas				0.5 - 0.8	2.0 - 2.2	73 - 97