4.5 Article

Role of Nitrate Species in the NO2-SCR Mechanism over a Commercial Fe-zeolite Catalyst for SCR Mobile Applications

Journal

CATALYSIS LETTERS
Volume 130, Issue 3-4, Pages 525-531

Publisher

SPRINGER
DOI: 10.1007/s10562-009-9942-x

Keywords

Urea SCR; NO2 SCR; Nitrates; Zeolite catalysts; Diesel exhausts aftertreatment

Funding

  1. Daimler AG

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The NO2-SCR reaction is studied by transient reaction analysis over a Fe-zeolite commercial catalyst. It is proposed that the NO2-SCR reaction occurs according to a mechanism wherein surface nitrates are first formed by NO2 disproportionation, followed by their catalytic reduction to nitrogen by ammonia.

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