METHOD OF PROCESSING NO OF EXHAUST GASES USING THREE CONSECUTIVE ZONES OF SCR CATALYSTS Russian patent published in 2016 - IPC B01D53/94 F01N3/10 

FIELD: engines.

SUBSTANCE: invention relates to system of exhaust gases of diesel engines. Method involves passing of exhaust gases through first zone with catalyst of metal/zeolite type, accelerating SCR HC, to produce first gaseous product. First gaseous product is passed through second zone, in which there is catalyst Ag/Al₂O₃, accelerating H₂-accelerating reaction SCR HC to obtain second gaseous product. Second gaseous product is passed through third zone, in which there is noble metal-based catalyst which speeds up SCR CO/H₂ to produce end, NO_x-depleted, exhaust gases. Mixing of gaseous reformate containing CO and H₂, one or more of exhaust gases of first gaseous product and second gaseous product.

EFFECT: use of number of catalysts provides attractive alternative to SCR based on urea, without need for source and reserves of urea.

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