(569s) Fe-Beta Zeolite for Simultaneous NH3-SCR of NOx and N2o with NH3: Effect of Chemical Composition and Preparation Method on Catalytic Performance

Simultaneous selective catalytic reduction of NOx and N₂O by NH₃ (Sim NH₃-SCR) is an ideal solution from exhaust compared to original catalytic process. Therefore, developing efficient heterogeneous catalysts for Sim NH₃-SCR is of industrial importance. Iron-exchanged zeolite beta (Fe-beta) is a promising catalyst for this reaction due to its highly active for NOx conversion as well as N₂O direct catalytic decomposition. Here, the effect of chemical composition and preparation method on the catalytic properties of Fe-beta zeolite for Sim-SCR has been investigated. Our findings revealed optimal conditions for maximizing the Sim-SCR performance of Fe-beta considering the Si/Al ratio, Fe sources, and loading method studied here. The comprehensive characterization results show the chemical composition and most efficient method to form Fe species over Fe-beta zeolite catalysts.