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Koppers Foster<br />

Blue Coal Gas Winkler Lurgi Totzek Brit. Gas Wheeler Coke<br />

Water Vertical Fluidized Fixed Entrained Texaco Moving Bed Fluidized Oven<br />

Process Gas Retorting Bed Bed Bed Stagging Bed Gas<br />

Air<br />

Oxygen<br />

Steam<br />

Analysis: %Mol<br />

O 2 — 0.4 0.4<br />

N 2 4.5 6.2 1.0 0.32 1.13 1.13 0.45 0.67 2.8<br />

CO 2 4.7 4.0 19 28.87 6.27 9.22 1.07 11.80 4.0<br />

H 2 O — — — 0.26 0.37 0.36 0.36 0.36 —<br />

CO 41 18 38 19.52 55.11 53.06 58.73 43.46 8.0<br />

H 2 49 49.4 40 38.80 3718 35.97 30.87 36.46 51.2<br />

CH 4 0.8 20 2 11.20 — 0.26 7.78 7.35 30.6<br />

C 2 H 6 — — — — — — 0.54 — 3.0<br />

H 2 S — — — 1.0 — 0.20 — —<br />

Molecular Weight 15.9 13.1 20.4 21.1 19.3 20.1 19.21 19.51 11.76<br />

LHV (Btu/scf) 273 383 250 274 278 271 354 306 993<br />

LHV (Btu/lb) 6504 11,051 4640 4918 5469 5125 6982 5954 15,890<br />

Wobbe Index Btu/scf 368 568 298 320 341 326 434 373 773<br />

Adiabatic Temp. Rise<br />

∆T stoich. (OC) 2073 1978 1924 1785 2100 2063 2108 1996 1965<br />

A/F stoich. by wt. 4.03 7.87 2.91 3.4 3.34 3.10 4.48 3.86 11.9<br />

Fuel Flow Mass Ratio 3.31 1.95 4.63 4.37 3.93 3.75 3.08 3.61 1.35<br />

Fuel Flow Vol. Ratio 3.32 2.15 4.11 3.82 3.58 4.20 2.81 3.28 1.58<br />

Limits of Flammability<br />

Lower U 25 6.38 5.6 7.48 7.50 7.56 7.86 7.04 7.23 4.86<br />

Upper U 25 70.0 38.8 66.7 45.9 72.6 71.6 55.4 55.5 30.2<br />

Ratio 11.0 6.91 8.92 6.12 9.60 9.10 7.86 7.68 6.21<br />

H—/CO (by Vol.) 1.195 2.744 1.053 1.99 0.675 0.678 1 0.526 0.839 6.4<br />

Table C-7-5. Properties of Medium-Btu Gas.<br />

368 Gas Turbine Handbook: Principles and Practices

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