Adiabatic Flame Temperatures

Adiabatic flame temperatures for various fuels (hydrogen, methane, propane, octane and others) with oxygen or air as oxidizers in a constant pressure adiabatic reaction. Temperatures are given in Kelvin.

FuelAdiabatic Flame Temperature with Oxygen (K)Adiabatic Flame Temperature with Air (K)
Acetaldehyde38172228
Acetone37052253
Acetylene - C2H239972607
Benzene - C6H637842363
n-Butane - C4H1038672248
iso-Butane - C4H1038612246
Butylene - C4H838672494
Carbon disulfide02257
Cyanogen48552596
Cyclohexane38652250
Cyclopropane39042370
Decane38332286
Ethane - C2H639032222
Ethanol37302238
Ethylene - C2H439322375
Hexane38552238
Hydrogen - H234732483
Methane - CH439532236
Methanol36562222
Neopentane - C5H1238502511
n-Hexane - C10H836822494
Naphthalene - C6H1439432533
Neohexane - C6H1438382508
n-Heptane - C7H1638512469
Oxirane37962177
n-Pentane - C5H1238482505
iso-Pentane - C5H1238572508
n-Pentene - C5H1038652569
Propane - C3H825262250
Propylene - C3H639022528
Toluene - C7H837862344
Triptane - C7H1638362497
p-Xylene - C8H1037882483

Combustion Conditions

  • Reactants enter the combustion process at 25°C (77°F) and 1 atm pressure
  • Products leave the process at 1 atm pressure
  • Combustion is stoichiometric without any excess air

Key Notes

  • Excess air will reduce the adiabatic flame temperature and is often introduced to avoid flame temperatures exceeding limits set by the materials in the combustion system
  • Methane (CH₄) is the major part in Natural gas
  • Fuel classifications:
    • Paraffins/Alkanes: n-Butane, iso-Butane, Ethane, Hexane, n-Pentane, iso-Pentane, Propane, Neopentane, Triptane
    • Olefins/Alkenes: Butylene, Ethylene, n-Pentene, Propylene
    • Aromatics: Benzene, Toluene, p-Xylene, Naphthalene
    • Other Hydrocarbons: Acetylene, Naphthalene
Adiabatic Flame Temperatures | MEPKit Engineering Tools | MEPKit