Smart Catalyst Technologies for Future Automotive Emission Control

Authors

Dr. K. Harth, Dr. S. Kumar, Dr. P. Burk, BASF Corporation, Iselin, NJ, USA; Dr. S. Stiebels, Dr. T. Mueller-Stach,
Dr. T. Neubauer, BASF Catalysts Germany GmbH, Hannover

Year

2012

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 735

Summary

Over the last decade, the tightening of emission regulations for vehicles has significantly increased the size and the complexity of automotive catalyst systems. In diesel-powered passenger cars for example, early requirements to limit the emissions of carbon monoxide and hydrocarbons could be met using a single Diesel Oxidation Catalyst (DOC) with a catalyst volume similar to the engine displacement volume. When particulate emissions had to be controlled, a Diesel Particulate Filter (DPF) was added. The DPF was often about twice the size of the DOC and required the incorporation of soot regeneration strategies into the engine control module. More recently, the introduction of Euro 6 regulations has forced the development of nitric oxide (NOx) emission controls by catalytic systems based on Lean NOx Traps (LNT) or Selective Catalytic Reduction (SCR) catalysts using ammonia as reducing agent. Incorporation of these NOx reduction components onto the vehicle adds significant volume and further complexity to the emission control system.

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