SCR and SCRi^® as After-treatment Systems for Low CO₂ and Low NOx Vehicles

Abstract

On one hand, latest worldwide emissions legislation developments aim to reduce NOx and Particulate Matter (PM) emissions of all diesel engines, while on the other hand lower fuel consumption diesel engines are still required for lower fl eet average CO 2 emissions. As a consequence of the chosen CO 2 optimized combustion mode, the raw NOx emission increases and as such Selective Catalytic Reduction (SCR) technology will be the future choice for high effi ciency NOx after-treatment. This paper deals with SCR technology and its derivative SCRi ® technology, when diesel particle reduction is required, especially for Heavy Duty applications. Alongside the developed metal catalyst technologies, a complete SCR reducing agent dosing system is presented. Emission results gained with the SCR or SCRi ® technologies on European commercial engines illustrate the potential of these technologies for conversion of NOx and PM emissions. This enables drafting of a road map for future emission control solutions, considering the local situation in India, for upcoming legislations.

Investigation of Underbody Metal SCR Systems with Active Thermal Management: Experience Update

“…1) has been proposed for this first level, accordingly [6]. The LS/PE-Design™ substrate technology takes advantages from the LS-Desgin™ structured corrugated foils [7], allowing a reduction of the thermal mass of the substrate matrix and the improvement of the mass transport at high temperatures, and of the PE-Design™ flat foils [7], allowing a gas mixing from one channel to the neighbor channels.…”