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Fuel Gas Properties

 

Fuel Gas

Formula

Specific Gravity

Air=1

Specific Volume

ft3/lb

Specific Weight

lb/ft3

O2 to

fuel gas ratio**

(theoretical)

Air to fuel gas ratio**

(theoretical)

Neutral Flame Temp* 

O2 - ºF

Neutral Flame Temp*

Air - ºF

Heat of Combustion

BTU/ft3
Natural Gas CH4 0.62 23.6 0.042 2.0 10.0 5036 3542 1000
Propane C3H8 1.52 8.7 0.115 5.0 23.9 5108 3595 2498
Methylacetylene-propadiene C3H4 1.48 8.9 0.112 4.0 19.0 5301 3700 2460
Acetylene C2H2 0.906 14.6 0.068 2.5 11.9 5612 4109 1470
Butane C4H10 1.42 9.2 0.109 1.8 29.5 5108 3443 3374

 

*  Available Data Sources show varying values

**  The volume units of Oxygen or Air required to burn a volume unit of fuel gas

 

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