A Modeling Study of NH3 Slip Catalysts: Analysis of the SCR/PGM Interactions

作者：Colombo Massimo; Nova Isabella; Tronconi Enrico^*; Koltsakis Grigorios

来源：Topics in Catalysis, 2013, 56(1-8): 177-181.

DOI：10.1007/s11244-013-9948-x

• NH3 slip catalyst
• Dual layer configuration
• PGM and SCR catalysts
• DeNox
• Diesel exhausts aftertreatment

We present a simulation study which comparatively analyzes the performances of four configurations of NH3 slip catalysts (ASC) for automotive NH3-SCR based Diesel aftertreatment systems. The comparison in terms of NH3 conversion and N-2 selectivity over a wide range of operating conditions highlights the positive interaction of NH3-SCR and PGM oxidation chemistries, which is best exploited by a dual-layer configuration with the SCR catalyst on top. This study also emphasizes the key role of modeling and simulation tools in the development of complex exhaust aftertreatment systems as well as the importance of a clear understanding of the catalytic chemistry involved in automotive deNOx converters.

• 出版日期2013-5