Fast Cycling NSR + SCR Over Dual-Layer Catalysts

Michael  Harold, University of Houston

Fast lean-rich cycling over NOx storage and reduction catalysts using hydrocarbon reductants leads to enhanced NOx conversion.  Our recent results indicate that this enhancement is not just observed at high temperature but also to temperatures below 250 C.  Further, fast cycling over dual layer NSR + SCR monolithic catalysts show additional enhancement.  Potential mechanisms will be discussed.

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