Paraffins and Alkanes - Combustion Properties
Properties like heat values, air/fuel ratios, flame speed, flame temperatures, ignition temperatures, flash points and flammability limits.
For full table with Maximum Flame Speed, Adiabatic Flame Temperature, Ignition Temperature, Flash Point and Flammable Limits LEL UEL - rotate the screen!
| Paraffin or Alkanes | Chemical Formula | Higher Heating Value (Btu/lbm) | Air/Fuel Ratio | Maximum Flame Speed (ft/s) | Adiabatic Flame Temperature (oF) | Ignition Temperature (oF) | Flash Point (oF) | Flammability Limits | |
|---|---|---|---|---|---|---|---|---|---|
| LEL | UEL | ||||||||
| Ethane | C2H6 | 22323 | 15.899 | 1.3 | 3540 | 968 - 1166 | *) | 3.0 | 12.5 |
| n-Butane | C4H10 | 21321 | 14.984 | 1.2 | 3583 | 761 | -76 | 1.9 | 8.4 |
| iso-Butane | C4H10 | 21271 | 14.984 | 1.2 | 3583 | 864 | -117 | 1.8 | 8.4 |
| n-Heptane | C7H16 | 20854 | 14.141 | 1.3 | 3985 | 433 | 25 | 1.0 | 6.0 |
| n-Hexane | C6H14 | 20966 | 15.238 | 1.3 | 4030 | 478 | -7 | 1.3 | 7.0 |
| Methane | CH4 | 23875 | 17.195 | 1.1 | 3484 | 1301 | *) | 5.0 | 15.0 |
| Neopentane | C5H12 | 20978 | 15.323 | 1.1 | 4060 | 842 | *) | 1.4 | 7.2 |
| Neohexane | C6H14 | 20931 | 15.238 | 1.2 | 4055 | 797 | -54 | 1.2 | 7.6 |
| n-Octane | C8H18 | 20796 | 15.093 | 428 | 56 | 0.9 | 3.2 | ||
| iso-Octane | C8H18 | 20770 | 15.093 | 1.1 | 837 | 10 | 0.8 | 5.9 | |
| n-Pentane | C5H12 | 21095 | 15.323 | 1.3 | 4050 | 588 | < -40 | 1.4 | 7.8 |
| iso-Pentane | C5H12 | 21047 | 15.323 | 1.2 | 4055 | 788 | < - 60 | 1.3 | 9.2 |
| Propane | C3H8 | 21669 | 15.246 | 1.3 | 3573 | 871 | *) | 2.1 | 10.1 |
*) gas
- LEL - Lower Explosive or Flammable Limit
- UEL - Upper Explosive or Flammable Limit
- 1 ft/s = 0.3048 m/s
- T(oC) = 5/9[T(oF) - 32]
- 1 Btu/lbm = 2,326.1 J/kg = 0.55556 kcal/kg
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