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.055<br />

Parameters Units 1/0 .88/.12 .66/.34 .55/.45 .44/.56 .33/.67 .22/.78 .11/.89 .945<br />

Molecular Weight<br />

Lower Heating Value<br />

Lower Heating Value<br />

lb<br />

mol 16.04 19.4 25.55 28.63 31.7 34.78 37.88 40.93 42.47<br />

Btu<br />

lb 21,505 15,650 8911 6628 4788 3273 2005 927 447<br />

Btu<br />

scf 909 800 600 500 400 300 200 100 50<br />

Adiabatic Temperature 1924 1887 1791 1720 1623 1482 1256 837 456<br />

Rise, ∆T ab °C<br />

stoich<br />

Stoich Air/Fuel Ratio<br />

lb<br />

lb 17.24 12.55 7.14 5.31 3.84 2.62 1.61 0.74 0.36<br />

Fuel Flow Mass Ratio<br />

Wobbe Index<br />

Fuel Flow Volume Ratio<br />

(Btu/lb)<br />

Btu/lb CH 4 1 1.37 2.41 3.24 4.49 6.67 10.73 23.20 48.11<br />

LHV<br />

M Gas<br />

M Air<br />

Btu<br />

scf 1222 978 639 503 382 274 175 84 41<br />

(Wobbe)<br />

Wobbe CH 4<br />

1 1.25 1.91 2.43 3.20 4.46 6.96 14.55 29.8<br />

Limit of Flammability % Vol. 5 5.68 8.075 10.1 12.56 17.3 NF NF NF<br />

Lower, L 25<br />

Limit of Flammability % Vol. 15.1 15.36 18.575 20.59 23.25 27.15 NF NF NF<br />

Higher, U 25<br />

Limit of Flammability 3.1 2.7 2.3 2.04 1.88 1.57 — — —<br />

Ratio- U 25 /L 25<br />

366 Gas Turbine Handbook: Principles and Practices<br />

Table C-7-3. Properties of CH 4 /CO 2 Gases.

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