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Article Dans Une Revue Catalysis Communications Année : 2008

Cooperative effect of Pt–Rh/Ba/Al and CuZSM-5 catalysts for NO reduction during periodic lean-rich atmosphere

Résumé

NOx removal efficiency was investigated with a combination of model Pt–Rh/Ba/Al and Cu-ZSM-5 catalysts using periodic fluctuations between lean (100 s) and rich (10 s) atmosphere. NOx removal is greatly improved at 250 °C and 300 °C by physically mixing the two catalysts. The mixed catalyst shows a NOx removal activity almost double as compared to a system where Pt–Rh/Ba/Al catalyst is situated upstream and CuZSM-5 downstream the gas flow. FT-IR characterisation shows that CuZSM-5 catalyst enhances the formation of NCO species on alumina during rich conditions. These NCO are further hydrolyzed to NH3 under lean condition which acts as a reductant for NOx.

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Catalyse Autre
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Dates et versions

hal-03107558 , version 1 (12-01-2021)

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E.C. Corbos, M. Haneda, Xavier Courtois, P. Marecot, D. Duprez, et al.. Cooperative effect of Pt–Rh/Ba/Al and CuZSM-5 catalysts for NO reduction during periodic lean-rich atmosphere. Catalysis Communications, 2008, 10 (2), pp.137-141. ⟨10.1016/j.catcom.2008.06.014⟩. ⟨hal-03107558⟩

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