Abgasreinigungsanlage mit Stickoxidreduktion unter Reduktionsmittelzugabe

摘要

A purification system for an exhaust gas stream (6) especially from a vehicle internal combustion engine has a catalyst (3) for reduction of the nitrogen oxides by an introduced reductant vapor together with a dosing device (4,5) for the reductant (or precursor) and a vaporizer (5, 5a, 5b) arranged upstream from the catalyst (3), this vaporizer having a microwave generator for evaporating the reductant.