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We report observations of the nature and spatial distribution of sulfur species on a sulfated Ba-based commercial lean NO x trap (LNT) catalyst. The monolithic catalyst was sulfated in a bench flow reactor during 60/5-s NO x -storage/reduction cycling to achieve a total sulfur loading of 3.4gL −1 of catalyst. Washcoat composition, structure and sulfur distribution were analyzed...
We experimentally studied the influence of temperature and sulfur loading on the axial distribution of reactions inside a commercial lean NO x trap (LNT) catalyst to better understand the global performance trends. Our measurements were made on a monolith core, bench-flow reactor under cycling conditions (60-s lean/5-s rich) at 200, 325, and 400°C with intra-catalyst and reactor-outlet gas...
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