Wobbe Index - Wobbe Index of Common Fuel Gases

Wobbe Index of Common Fuel Gases

Fuel gas Upper index
Kcal/Nm3		 Lower index
Kcal/Nm3		 Upper index
MJ/Nm3		 Lower index
MJ/Nm3
Hydrogen 11,528 9,715 48.23 40.65
Methane 12,735 11,452 53.28 47.91
Ethane 16,298 14,931 68.19 62.47
Ethylene 15,253 14,344 63.82 60.01
Natural gas 12,837 11,597 53.71 48.52
Propane 19,376 17,817 81.07 74.54
Propylene 18,413 17,180 77.04 71.88
n-butane 22,066 20,336 92.32 85.08
Iso-butane 21,980 20,247 91.96 84.71
Butylene-1 21,142 19,728 88.46 82.54
LPG 20,755 19,106 86.84 79.94
Acetylene 14,655 14,141 61.32 59.16
Carbon monoxide 3,060 3,060 12.80 12.80
Note: 1 Joule = 2.3901×10−4 kcal.

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