Highly efficient simultaneous conversion of NOx and N2O using NH3 over Fe-beta zeolites: The critical role of preparation method

Key Points

• This research focuses on understanding how the preparation method of Fe-beta catalysts affects the simultaneous removal of NOx and N2O.
• Evaluated Fe-beta catalysts for NOx and N2O conversion performance.
• Assessed the effects of different Fe loading methods: liquid-state ion exchange, incipient wetness, and solid-state ion exchange.
• Investigated the role of isolated Fe species and their ratio in catalytic performance.
• Liquid-state ion exchange improved NOx conversion efficiency.
• Incipient wetness and solid-state ion exchange led to inhibition of NOx conversion due to N2O.
• Performance linked to ratio of Fe2+ to (Fe3+ + Fe2+) species.