Combustion Values for some common Fuel Gases

Combustion values for some common fuel gases - natural gas, propane and butane - in Btu per cubic feet

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Combustion or heating values for some common fuel gases are indicated in the table below:

Fuel Gas Combustion Value Specific Gravity
(Btu/cubic feet) 1) (kJ/m3)
Blast Furnace 92 3,400 1.02
Butane 3,184 118,600 2
(more heavy than air)
Coke oven 570 21,200 0.40
Manufactured Gas 500 - 600 18,600 - 22,300
Natural Gas 950 - 1,150 35,000 - 42,800 0.660 - 0.708
(more light than air)
Propane 2,504 93,300 1.77
(more heavy than air)
Propane-Butane Mix 2,500 - 3,200 93,000 - 119,000
Produces Bituminous 163 6,000 0.86

1) 1 Btu/ft3 = 8.9 kcal/m3 = 3.73x104 J/m3

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  • Combustion Boiler house topics - fuels like oil, gas, coal, wood - chimneys, safety valves, tanks and combustion efficiency

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