Modeling of SCR DeNOx Catalyst - Looking at the Impact of Substrate Attributes

Christian Winkler; Peter Flörchinger; M. D. Patil; Jürgen Gieshoff; Paul Spurk; Marcus Pfeifer

doi:10.4271/2003-01-0845

2003-03-03

Modeling of SCR DeNOx Catalyst - Looking at the Impact of Substrate Attributes 2003-01-0845

The present work intends to examine the selective NOx reduction efficiency of a current commercial Titanium-Vanadium washcoated catalyst and to develop a transient numerical model capable of describing the SCR process while using a wide range of inlet conditions such as space velocity, oxygen concentrations, water concentration and NO₂/NO ratio. The concentrations of different components (NO, NO₂, N₂O, NH₃, H₂O and HNO₃) were analyzed continuously by a FT-IR spectrometer. A temperature range from 150°C up to 650°C was examined and tests were carried out using a model exhaust gas comparable to the real diesel exhaust gas composition. There is a very good correlation between experimental and calculated results with the given chemical kinetics.

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Modeling of SCR DeNOx Catalyst - Looking at the Impact of Substrate Attributes 2003-01-0845

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