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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!

Paraffins and Alkanes - Combustion Properties
Paraffin or AlkanesChemical FormulaHigher Heating Value
(Btu/lbm)
Air/Fuel RatioMaximum Flame Speed
(ft/s)
Adiabatic Flame Temperature
(oF)
Ignition Temperature
(oF)
Flash Point
(oF)
Flammability Limits
LELUEL
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

 

Related Topics

  • Combustion

    Combustion processes and their efficiency. Boiler house and chimney topics. Properties of fuels like oil, gas, coal and wood and more. Safety valves and tanks.

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