BaSO 4 -Coated V/Fe/Barium Slag ZSM-5 Catalysts for Improved SO 2 Tolerance in SCR: Insights into a Dual-Protection Mechanism
Hazardous solid waste [e.g., barium slag (BS)] can be transformed into highly efficient molecular sieve catalysts. However, catalyst deactivation caused by SO<sub>2</sub> poisoning remains a critical scientific challenge that requires urgent attention. Herein, V/Fe/BS-ZSM-5 molecular sieves have been devised for the NH<sub>3</sub>-SCR for NO removal reaction, showing improved SO<sub>2</sub> resistance. This protection includes a two-step protection process: first, Ba<sup>2+</sup> acts as a sacri