The application of fuel staging on reducing NOx emissions from gas burner

This paper present the method of burning gaseous fuel at two different places, i.e. in the swirler vane passages and at the exit plane of the first combustor for a two stage combustion system. The present work only used natural gas. The effect of injecting the secondary fuel has a vast influence on reducing emissions of oxides of nitrogen. The reduction was found to be greater than 50% even at near stoichiometric conditions. The secondary fuel acted as a reducing element for the thoroughly formed oxides of nitrogen from the first stage combustion