THERMALLY REGENERATED ADSORBENT OF NITROGEN OXIDES Russian patent published in 2011 - IPC B01D53/94 F01N3/20 

FIELD: chemistry.

SUBSTANCE: invention is designed to restore nitrogen oxides and may be used to treat waste gas produced during combustion. The method to restore nitrogen oxides (NO_x), present in waste gas flow, containing nitrogen oxide (NO), includes the following stages. NO is adsorbed from waste gas flow on adsorbent containing palladium and cerium oxide, at the temperature below 200°C. Further NO is thermally desorbed from adsorbent of NO in waste water flow at temperature of 200°C and higher, and catalytic recovery of NO_x is carried out on a catalyst that is different from NO adsorbent. A reducing agent is selected from a group made of a hydrocarbon reducer, a nitrogen-containing reducer, hydrogen and mixture of any two or more of them. Also a system is disclosed for recovery of nitrogen oxides in compliance with the specified method and an internal combustion engine on its basis.

EFFECT: method and system make it possible to more efficiency treat waste gas from nitrogen oxides.

29 cl, 9 dwg, 4 ex