Adiabatic Flame Temperature Calculator
Chemical thermodynamics & combustion engineering: Determine theoretical adiabatic flame temperature ($T_{ad}$), product enthalpy, and flue gas thermochemistry under constant pressure.
Fuel & Combustion Air
Standard hydrocarbon / fuel gas
0% = Stoichiometric (λ = 1.0)
Preheat temperature (air preheater / recuperator)
Atmospheric furnace = 1 bar, Gas turbine = 15–30 bar
First Law Enthalpy Balance
In an ideal adiabatic combustor without heat loss ($Q = 0$) or work ($W = 0$):
$$H_{\text{reactants}}(T_{\text{inlet}}) = H_{\text{products}}(T_{ad})$$
$$\sum n_r \Delta h_{f,r}^\circ + \int_{T_0}^{T_{\text{in}}} C_{p,r} dT = \sum n_p \Delta h_{f,p}^\circ + \int_{T_0}^{T_{ad}} C_{p,p}(T) dT$$
Theoretical Flame Temperature
Adiabatic Flame Temp (°C)
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Absolute Flame Temp (K)
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Combustion Stoichiometry
Equivalence Ratio (φ)
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Air-fuel ratio: λ = 1/φ
Air-to-Fuel Mass Ratio (AFR)
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kg dry air per kg fuel
Thermochemical Details
Thermal NOx Formation Potential:
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Preheat Enthalpy Boost:
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Dissociation Suppression (High P):
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