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

Abstract

<div class="htmlview paragraph">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 NO<sub>2</sub>/NO ratio. The concentrations of different components (NO, NO<sub>2</sub>, N<sub>2</sub>O, NH<sub>3</sub>, H<sub>2</sub>O and HNO<sub>3</sub>) 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.</div>