Commercially available lean NO x catalyst and lean NO x adsorber samples were tested in a synthetic exhaust gas bench with DME as reducing agent. The LNA catalyst gave a very high NO x conversion (> 80 %) over a wide temperature range (275-450°C), and with low concentration of by-products such as NH 3 , N 2 O and methanol. The Cu-zeolite based LNC catalyst, however, showed practically no NO x conversion.
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