The key diesel emission control papers of the last 12 months have been summarized. In addition, the emerging US and European light-duty and heavy-duty tailpipe regulations are compared. Results are reported on light-duty diesel filtration regeneration systems and experiences, including effects of ash build-up and some recent modeling work. On the heavy-duty side, optimization of SCR catalysts and systems are described, as well as experiences with the first integrated SCR/filter systems, which are already achieving “Euro V” 2008 standards. An update on NOx adsorbers is also provided. The results with new NOx formulations are described, as well as the system performance in a light-duty diesel application.
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