| 摘要 |
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 NOx reduction catalyst containing: a Cea-Zrb-Rc-Ad-Ox 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 550C. ^ EFFECT: ensuring high thermal stability of the catalyst and high conversion of NOx. ^ 17 cl, 9 dwg |
