Enhanced phosphorus resistance of sodium-promoted Cu/CHA catalysts towards NH3-SCR

Abstract

Cu/CHA and sodium-promoted Cu/CHA catalysts were prepared and applied to catalyze NH3-SCR reaction. Also, the effect of phosphorus poisoning on the catalytic performance of these two catalysts were explored. Compared with Cu/CHA catalyst, sodium-promoted Cu/CHA catalyst presented better catalytic performance, which was attributed to the optimized distribution of copper active sites. Moreover, it was proved that sodium ions as sacrificial sites could effectively protect copper active ions and improve the phosphorus poisoning resistance of the sodium-promoted Cu/CHA catalyst.

Keywords

• Phosphorus
• Cu/CHA
• NH3-SCR
• Sodium