Preheating of a gaseous fuel results in increased____________________?
Correct answer: C. Flame temperature
- A. Flame length
- B. Quantity of flue gas
- C. Flame temperature
- D. Ignition temperature
Explanation
Preheating a gaseous fuel raises the initial enthalpy of the reactants, so less heat is needed to reach the reaction temperature and the adiabatic flame temperature increases. It does not raise the ignition temperature, which is a fuel-property threshold.
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