Browse Publications Technical Papers 2003-01-3243
2003-10-27

A New Transient NOx Direct Catalytic Decomposition on a Rh-based Catalyst 2003-01-3243

It has been found that over Rh/a specified support NOx is eliminated using rich/lean excursions in a different reaction mechanism from a Lean NOx Trap system, where NO is decomposed into nitrogen and oxygen. The contribution of the transient NOx direct decomposition to NOx elimination depends on both reaction conditions and supports. 0.1-0.5wt%Rh and 0.5wt%Pd/a specified support: X can mainly catalyze the transient NO decomposition. On the other hand, on another Rh-based catalyst NO reduction proceeds mainly in the Lean NOx trap system.
As expected from the NO elimination mechanism, the newly developed catalyst has shown a high tolerance against SOx.

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