Effect of Ammonia in Gaseous Fuels On Nitrogen Oxide Emissions

Abstract
The effect of ammonia in the fuel on NOx emissions was investigated through laboratory experiments and field burner tests. It was found that the degree of conversion of pm-monia to NOx was a strong function of excess air, ammonia content in the fuel, and of the degree of mixing in the flame. In premixed laboratory flames concentrations of NOx above the peak equilibrium amounts were produced. In furnace diffusion flames the conversion to NOx was much less. At substoichiometric air-fuel ratios all the ammonia appears to pyrolize, forming N2, and only very little NOx. Several methods for burning ammonia to produce low NOx emissions were investigated.

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