FIELD: chemistry.
SUBSTANCE: invention relates to a method and a device for reducing content of NOx oxides and diazotide oxides N2O in injected gas. Method includes the following steps: exposure of gas (1) to first amount of NOx reducing agent (2) in first catalytic NOx removal layer (3); treatment of outflow (4) of first catalytic NOx removal layer (3) in at least one catalytic removal layer (5) N2O to eliminate N2O; treatment of outgoing flow (6) of at least one catalytic layer (5) for removal of N2O with second amount of NOx reducing agent (7) in second NOx removal catalytic layer (8).
EFFECT: technical result consists in reduction or elimination of risk beyond specified limit, that is final concentration of nitrogen oxides NOx and diazotes N2O can be achieved.
17 cl, 2 dwg, 1 ex
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