METHOD AND DEVICE FOR CLEANING OF EXHAUST GAS Russian patent published in 2010 - IPC F01N3/35 

FIELD: technological processes.

SUBSTANCE: group of inventions may be used to clean exhaust gas of internal combustion engines. Device for cleaning of exhaust gas comprises device for supply of reducing agent, the first absorption-reduction catalyst NO_x and the second catalyst-filter, arraged in container serially, device for changing direction of exhaust gas flow, at the same time exhaust gas flows from absorption-reduction catalyst NO_x to catalyst filter in process with normal flow, and in process of reduction exhaust gas, to which reducing agent has been added, flows with change in flow direction to reverse one in direction towards absorption-reduction catalyst NO_x from catalyst filter. Since exhaust gas is heated by means of heat from reaction of catalyst filter, absorption-reduction catalyst NO_x may be reduced from poisoning of sulfur in exhaust gas at low temperature. By means of this, overheating of catalyst filter is prevented.

EFFECT: improved reduction from sulfur poisoning, prevention of damage and failure of catalyst filter.

8 cl, 9 dwg