A Study on Reaction Mechanism in Diesel Particulate Filter Coated with SCR Catalyst

- Impacts of Gas Composition and Soot Loading Condition on NH₃ SCR Reaction -

Abstract

For the Diesel Particulate Filter coated with NH₃ SCR Catalyst, it is thought that coexistence gases, such as CO, CO₂ and/or HC in exhaust gas, and PM loading reduce catalytic reactions required for NOx reduction. Coexistence gases have impacts on the reaction phenomena in this catalyst. In this study, the catalyst evaluation test that was performed by using the model exhaust gas and the PM exhausted from engine. Experimental results shows that the coexistence gases and the PM loading conditions have impacts on NH₃ SCR reaction activities.