Ce-Zr-R-O CATALYSTS, ARTICLES CONTAINING Ce-Zr-R-O CATALYSTS AND METHODS OF PRODUCING AND USING Ce-Zr-R-O CATALYSTS Russian patent published in 2012 - IPC B01J23/10 B01J23/16 B01J21/06 B01J35/00 B01D53/56 

FIELD: chemistry.

SUBSTANCE: present invention relates to NOx reduction catalysts, filters for trapping solid particles, exhaust gas treatment systems and methods of treating a gas stream. The invention describes a NO_x reduction catalyst containing: a Ce_a-Zr_b-R_c-A_d-O_x compound in which "R" denotes W or Mn; if "R" denotes W, "A" denotes Mo; if "R" denotes Mn, "A" is selected from a group comprising W, Mo and combinations containing at least one of the listed versions of "A"; a+b+c+d=1; "a" ranges from 0.1 to 0.6; "b" ranges from 0.25 to 0.7; "c" ranges from 0.02 to 0.5; if "R" denotes Mn, "d" ranges from 0.04 to 0.2, and if "R" denotes W, "d" is equal to or less than 0.2; the catalyst is capable of reducing NOx. Described is a method of treating a gas stream, involving feeding the gas stream onto the catalyst described above, reducing an amount greater than or equal to 50 vol. % NOx contained in the gas stream in terms of the total volume of NOx, initially contained in the gas stream; wherein the gas stream is at temperature ranging from 150 to 550°C.

EFFECT: ensuring high thermal stability of the catalyst and high conversion of NOx.

17 cl, 9 dwg