As its predecessors, CAPoC4 proved to be a suitable platform for discussing technological improvements and developments along with future perspectives and challenges. In the light of new results and further legislative regulations, the following topics were intensely discussed:
*low light-off behaviour based on improved catalysts and substrate formulations
*efficient adsorber systems for storage of hydrocarbon emissions
*electrically heated catalyst systems ahead the main catalyst or, alternatively, close coupled catalysts (at the manifold of the engine)
• lean DeNO
* collection and destruction of dry particulates or soot.
There is no doubt that clean vehicle technology is a vital part of improving air quality. Challenges remain and call for technological answers. Catalytic air pollution control is still an area providing a considerable incentive for innovative work.