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A crystallite-scale model that explicitly accounts for the diffusion of stored NOx in the storage phase is used to explain the effects of cycle time, Pt dispersion and loading on NOx conversion and NH 3 selectivity on low Pt dispersion NOx storage/reduction (NSR) catalysts. The low Pt dispersion or aged NSR catalysts are known to give high selectivity to NH 3 which is essential for...
A recently developed crystallite-scale regeneration model [D. Bhatia, M.P. Harold and V. Balakotaiah, Catalysis Today 151 (2010) 314] is extended and new data are reported that provide insight about cyclic NO x storage and reduction (NSR). The model is based on the concept of NO x spillover from Pt to BaO and diffusion in the barium phase during storage and the reverse process during...
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