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

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.

Automated summary

Cu/CHA and sodium-promoted Cu/CHA catalysts were prepared and their catalytic performance in NH3-SCR reaction was investigated. The sodium-promoted Cu/CHA catalyst showed better catalytic performance compared to Cu/CHA catalyst, which was attributed to the optimized distribution of copper active sites. Furthermore, it was demonstrated 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.