DeNOx-plant

nitrogen oxides emerge during the combustion of waste or inside a diesel engine. This oxides are harmful for the ozon layer. With ammonia (NH₃) and a catalyst it is possible to reduce the nitrogen oxides.

A chemical reaction can be:

4NO   + 4NH₃ + O₂ --> 4N₂ + 6H₂O

2NO₂ + 4NH₃  + O₂ --> 3N₂ + 6H₂O

The better the inflow of the catalyst the higher the efficiency of the reaction. A good inflow means a homogenous velocity- and ammonia concentarion field in front of the catalyst. Typical values:

Ammonia concentration: +/- 10%

Velocity mean deviation: + / - 15%

To reach this tolerances the implementation of baffle plates, static mixers etc. are necessary. With cfd the implementation/adjustment is economiclal compared to building a prototype.

denitrification

The pictures below are showing the evaporation of ammonia and the Streamlines inside the duct.