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• W3196804595 endingPage "120684" @default.
• W3196804595 startingPage "120684" @default.
• W3196804595 abstract "Detailed understanding of the poisoning mechanism in Diesel oxidation catalysts (DOCs) is the key to prevent long term catalyst deterioration in vehicles. The present work studies artificial phosphorus (P) poisoning methods applied to a commercial DOC. Cores of the DOC monolith were exposed to increasing amounts of P precursor by impregnation and by spraying. While impregnation leads to a homogeneous poison distribution in the catalytic layers, elemental analysis revealed that the spraying results in radial and axial P gradients that mimic the distribution of this poison previously observed in vehicle aged DOCs. The activity tests under simulated Diesel exhaust evidenced that P deposition by spraying was more detrimental than by impregnation and caused a more severe decrease in NO oxidation performance. Sequential treatments comprising exposure to P, thermal treatment and exposure to sulphur (S) interleaved by activity tests were performed to gain deeper insight into the catalyst deactivation mechanism. • Artificial P poisoning of DOC is performed by impregnation and spraying methods. • Unlike impregnation, spraying results in P gradients similar to real aged. • Spraying results in more severe decrease of NO conversion. • Combination of P, thermal and S treatments is also studied." @default.
• W3196804595 created "2021-09-13" @default.
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• W3196804595 date "2021-12-01" @default.
• W3196804595 modified "2023-10-01" @default.
• W3196804595 title "Understanding the impact of poison distribution on the performance of Diesel oxidation catalysts" @default.
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• W3196804595 doi "https://doi.org/10.1016/j.apcatb.2021.120684" @default.
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