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Scientists develop urea-based treatment for diesels

Swiss scientists have developed a new type of selective catalytic conversion system using an urea solution which it hopes can be incorporated into future diesel vehicles.

The new system, produced at the Swiss Paul Scherrer Institute, is claimed to dispose of over 90% of the nitrogen oxides (NOx) in diesel exhaust gases, which are blamed for most of European ozone pollution in hot weather.

To optimise the disposal of NOx, the amount of urea supplied from a separate tank adapts continuously to different drive phases.

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