Adiabatic Flame Temperature Calculator

Have you ever felt finding the Adiabatic Temperature is difficult? If so, don't bother anymore as we have a handy online Tool Adiabatic Flame Temperature Calculator. You can get the Adiabatic Flame Temperature of the combustion products in the blink of an eye on entering the inputs.

Adiabatic Flame Temperature Calculator: If you are looking out on ways to determine the Adiabatic Flame Temperature then make use of this extraordinary online tool i.e. Adiabatic Flame Temperature Calculator. The handy tool gives you instant results along with necessary steps. Continue reading further to know the details like What does Adiabatic Flame Temperature actually mean, its formula, steps to compute AFT manually along with few solved examples.

What is Adiabatic Flame Temperature?

Whenever a combustion reaction occurs eneregy is released to the combustion products. If at all there is no heat loss in the process the temperature of combustion products is known as Adiabatic Flame Temperature.

Adiabatic Flame Temperature of Various Products in Kelvin

Fuel Adiabatic Flame Temperature
(K)
Oxygen *)
as Oxidizer
Air
as Oxidizer
Acetaldehyde 3817 2228
Acetone 3705 2253
Benzene - C6H6 3) 3784 2363
Acetylene - C2H24)
3997 2607
n-Butane - C4H10 1) 3867 2248
Butylene - C4H8 2) 3867 2494
iso-Butane - C4H10 1) 3861 2246
Carbin disulfide 2257
Cyclohexane 3865 2250
Cyanogen 4855 2596
Cyclopropane 3904 2370
Decane 3833 2286
Ethanol 3730 2238
Ethane - C2H6 1) 3903 2222
Ethylene - C2H4 2) 3932 2375
Hexane 3855 2238
Methane - CH4 1) 3953 2236
Hydrogen - H2 3473 2483
Methanol 3656 2222
Neopentane - C5H12 1) 3850 2511
Naphthalene - C6H14 4) 3943 2533
n-Hexane - C10H8 1) 3682 2494
Neohexane - C6H14 1) 3838 2508
n-Heptane - C7H16 1) 3851 2469
Oxirane 3796 2177
iso-Pentane - C5H12 1) 3857 2508
n-Pentane -C5H12 1) 3848 2505
n-Pentene - C5H10 2) 3865 2569
Propane - C3H8 1) 2526 2250
Propylene- C3H6 2) 3902 2528
Toluene - C7H8 3) 3786 2344
p-Xylene - C8H10 3) 3788 2483
Triptane - C7H16 1) 3836 2497

Types of Adiabatic Flame Temperature

In general, there are two types of Adiabatic Flame Temperature and they are namely

  • Constant Pressure Adiabatic Flame Temperature
  • Constant Volume Adiabatic Flame Temperature

Constant Pressure Adiabatic Flame Temperature:

As per the first law of thermodynamics at constant pressure ∆U = Qρ- Wp = Qρ - ρ∆V

H = U+ρ∆V

At constant pressure ∆H = ∆U+ρ∆V+V∆ρ =∆U+ρ∆V

In case of Adiabtic Conditions Qρ = 0, ∆H =0

In Equilibrium Reaction HReactants = HProducts

We know ΣHProducts(Ti,ρ) = Σni[∆H0f,i+Ai(T-TR)+Bi/2(T-TR)2+Ci/3(T-TR)2]

Flame Temperature can be determined considering the above equation. We will assume QVL =0. If we use the mean heat data capacity we have ΣHProducts(Ti,ρ) = Σni[∆H0f,i + (C¯ρ,l)(Tad-TRef)

Constant Volume Adiabatic Flame Temperature

As per the first law of thermodynamics QV = ∆U, QP-nRT = ∆HP-∆nRT

In case of adibatic process QV = 0 = ∆HP-nRT

HReactants(Ti, ρi) - HProducts(Tad, ρf)-R(nreactantsTi - nProductsTad) = 0

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FAQs on Free Adiabatic Flame Temperature Calculator

1. What affects Adiabatic Flame Temperature?

The Primary factors that influence the Adiabatic Flame Temperature are Fuel Air Ratio, Initial Temperature, Pressure and Fuel Type.


2. Does Adiabatic Flame Temperature increase with pressure?

At high pressures Adiabatic Flame Temperatures usually decrease instead of increasing as high pressure in the combustion chamber creates a back pressure.


3. How to find the Adiabatic Flame Temperature at constant volume?

At Constant Volume Adiabatic Flame Temperature can be found by equating internal energy of products and reactants.


4. Which gas has the highest Adiabatic Flame Temperature?

Zirconium has the highest Adiabatic Flame Temperature.