A new concept of combined NH3-CO-SCR system for efficient NO reduction in exc…

Abstract. A new concept of a novel ‘‘dual bed’’ configuration of NH3 and CO-SCR catalytic system (NH3-CO-SCR), comprising Cu/Beta as top catalyst bed for NH3-SCR andWO3/Ir/SiO2 as bottom catalyst bed for CO-SCR, is described in this article. The combined catalytic system provides high NO reduction efficiency, in a broad temperature range (160–600 oC). The NO conversion over the co…