Comparison of De-NOx and Adsorber Catalysts to Reduce NOx - Emissions of Lean Burn Gasoline Engines

A comparison of two different types of NO_x reducing catalysts will be worked out.

The potential of two De-NOx catalysts using engine out hydrocarbon emissions for NO_x conversion will be shown by variation of different engine parameters. An analysis of the hydrocarbon species upstream and downstream catalyst will demonstrate, which components are responsible for the NO_x reduction in the exhaust gas of a lean burn engine.

By variation of different parameters during adsorbtion and regeneration phases of the adsorber catalyst the efficiency in NO_x reduction will be optimized.

An assessment of the suitability for lean burn engines will consider the emission reduction efficiency as well as the influence on engine fuel consumption.