FIELD: devices for catalytic reduction of nitric oxides contained in exhaust gases of internal combustion engines. SUBSTANCE: proposed device is provided with exhaust pipe line 1 whose one end is connected with at least one exhaust hole. Device is also provided with supply system 3 for delivery of reducing agent, carbamide first of all to exhaust pipe line 1. Device has one mixer 2 which is located after point of delivery of reducing agent to exhaust pipe line 1 in way of flow of exhaust gas. Mixer 2 has many flow-through passages 9 for fluid medium. Mounted after mixer 2 is at least one catalytic neutralizer 7. Mounted between mixer 2 and neutralizer 7 is at least one diffuser 6 having many flow-through passages 21 for passage of exhaust gases at increased cross section in way of flow; shape of cross section of separate passages 21 at inlet of diffuser 6 is practically corresponds to shape of cross section of separate passages. EFFECT: enhanced efficiency. 10 cl, 9 dwg
