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Catalysts of EC - Zr - R - O -, articles comprising the catalytic EC - Zr - R - O -, and methods for the manufacture and use of the catalysts EC - Zr - R - O -
Catalysts of EC - Zr - R - O -, articles comprising the catalytic EC - Zr - R - O -, and methods for the manufacture and use of the catalysts EC - Zr - R - O -
Disclosed herein are NOx reduction catalysts, particulate filters, exhaust treatment systems, and methods of treating a gas stream. In one embodiment, a NOx reduction catalyst comprises CeSUBa/SUB-ZrSUBb/SUB-RSUBc/SUB-ASUBd/SUB-MSUBe/SUB-OSUBx/SUB. "R" is W and/or Mn. If "R" is W, "A" is selected from the group consisting of Mo, Ta, Nb, and combinations comprising at least one of the foregoing "A", and if "R" is Mn, A is selected from the group consisting of W, Mo, Ta, Nb, and combinations comprising at least one of the foregoing "A". "M" is a trivalent rare earth ion. a+b+c+d+e=1. "a" is about 0.1 to about 0.6; "b" is about 0.25 to about 0.7; "c" is about 0.02 to about 0.5; and if "R" is Mn, "d" is about 0.04 to about 0.2, and if "R" is W, "d" is less than or equal to about 0.2; while "e" is less than or equal to about 0.15. The NOx reduction catalyst is capable of reducing NOx.
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机译：本文公开了NO x还原催化剂，颗粒过滤器，排气处理系统和处理气流的方法。在一个实施方案中，NOx还原催化剂包含Ce a -Zr b -R c -A d -M e -O x 。 “ R”是W和/或Mn。如果“ R”为W，则“ A”选自Mo，Ta，Nb以及包含至少一个前述“ A”的组合，并且如果“ R”为Mn，则A选自由W，Mo，Ta，Nb以及包含至少一个上述“ A”的组合组成。 “ M”是三价稀土离子。 a + b + c + d + e = 1。 “ a”为约0.1至约0.6; “ b”为约0.25至约0.7; “ c”为约0.02至约0.5;如果“ R”为Mn，则“ d”为约0.04至约0.2，如果“ R”为W，则“ d”小于或等于约0.2。而“ e”小于或等于约0.15。 NOx还原催化剂能够还原NOx。
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