Methods of Reducing the Production of Nitrogen Oxides in the Combustion Chamber

A review about NOx reduction methods in stationary combustion chamber was prepared. The influences of them on NOx reduction were considered and compared. these methods were; fuel changing, low excess air, combustion modification and staging, adding secondary flow in combustion chamber to reduce maximum temperature and oxygen concentration, NOx reduction and produce nitrogen molecule in combustion chamber and catalytic combustion. Each combustion systems can use one or more of these methods to reduce NOx up to 70%. The amount of NOx reduction dependent on the parameters like: type of fuel, technology of combustion, operation condition, mandatory to prepare new appartus, flue gas composition, standards limitation, side effects of pollutant, safety, reliability and cost.