FIELD: process engineering.
SUBSTANCE: invention relates to method of reactivating thermally aged catalytic neutralisers-accumulators of nitrogen oxides containing compounds accumulating nitrogen oxides on carrier material containing cerium oxide. Invention covers the method of reactivating thermally aged catalytic neutraliser-accumulator of nitrogen oxide that comprises main compounds of strontium or barium, or both, on carrier material containing cerium oxide and contains compounds of strontium and/or barium formed due to thermal ageing with carrier material. Note here that compounds of strontium and/or barium with carrier material are decomposed by treating them with gas mix at 300°C to 500°C, said gas mix containing nitrogen oxide in amount of 0.05 to 5 % by volume, water steam in amount of 5 to 15 % by volume and carbon dioxide in amount of 0 to 20 % by volume. Proposed method (version) comprises dismantling, during scheduled servicing, of catalytic neutraliser-accumulator of nitrogen oxides that makes an integral part of exhaust system incorporated with vehicle driven by engine running on depleted fuel and treatment for 0.1 to 5 h by gas mix containing nitrogen oxides in amount of 35 % by volume, oxygen in amount of 5 to 50% by volume, water steam in amount of 5 to 30 % by volume, carbon dioxide in amount of 0 to 20 % by volume, and, not obligatorily, nitrogen in amount of approximating to 100 % by volume.
EFFECT: partial reactivation of catalytic neutraliser-accumulator of nitrogen oxides after its thermal damage.
8 cl, 3 ex, 5 dwg
