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This research focuses on understanding how the preparation method of Fe-beta catalysts affects the simultaneous removal of NOx and N2O.

June 3, 2026Applied Catalysis A General0 citationsOpen Access

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

HCH.M. Cho MJMin Gie Jung BLByeong-Hyeon Lee

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.

Abstract

• Fe-beta catalysts were evaluated for simultaneous removal of NOx and N 2 O. • The N 2 O impact on DeNOx activity depends critically on the Fe loading method. • Liquid-state ion exchange induces a promotional effect on NOx conversion. • Incipient wetness and solid-state ion exchange lead to N 2 O-induced NOx inhibition. • Performance is governed by isolated Fe species and the Fe 2+ /(Fe 3+ +Fe 2+ ) ratio.

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

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Abstract

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