Apparatus for catalytic reduction of nitrogen oxides NOx in combustion products

摘要

The appts. has a redn. catalyst (5), in an oxygen-contg. exhaust gas pipe, and an urea container (7) connected to a spray nozzle (9) for finely spraying urea soln. onto an evaporator (3). The evaporator (3) is in the form of a flow mixer. Pref. the flow mixer acts as a hydrolysis catalyst comprising a support structure coated with a 90-10:10-90 wt. ratio mixt. of Al2O3 and TiO2, SiO2, ZrO2 and/or H-zeolite.