FIELD: process engineering.
SUBSTANCE: invention relates to selective catalytic cleaning of exhaust and flue gases of nitrogen oxides. Proposed method comprises catalytic removal of nitrogen oxide from gas using ammonia as reducing agent and removal of unreacted ammonia from gas phase. Note here that removal of said unreacted ammonia from gas phase is performed with the help of cation exchanger charged with metal/metals forming strong complexes with ammonia.
EFFECT: higher efficiency of cleaning, reduction of ammonia concentration to, in fact, whatever values.
3 cl, 1 dwg, 3 tbl
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