Experimental research on NOx removal by using a commercial honeycomb type SCR catalysts
CHEN Chongming
YU Jinxing
CHEN Ersong
LI Zhenhai
Abstract：To evaluate the removing effect of different forms of NOx by SCR (selective catalytic reduction) technology widely used in coal -fired power plants,this study takes the commercial honeycomb type SCR catalysts as an example to investigate the influence of oxygen concentration,temperature,space velocity and mole ratio of NH3/NO on NO,NO2 and N2 O removing process in a SCR denitration test rig.The results showed that oxygen could improve the oxidation of NO and catalytic reducing reaction between NO and NH3.High temperature could promote the removal of NO and oxidation of NH3 to N2O.And increasing space velocity,the NO removal would trend from rise to decline;as well,high mole ratio of NH3/NO could accelerate the NO removal and NH3 releasing.However,the removal of NO2,N2O is hard to achieve completely react with NH3.Thus,for ultra-low NOx emission,the coal combustion parameters should be optimized properly to avoid the formation of N2O.
Keywords：SCR catalystNOx removalammonia oxidation
Publication Date：2017-01-01