Title:
EXHAUST EMISSION PURIFYING CATALYST AND ITS USE
Document Type and Number:
Japanese Patent JP3885376
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an exhaust emission purifying catalyst capable of enhancing NOx purifying capacity in a lean atmosphere and sufficiently developing a function as a ternary catalyst and a use method capable of especially effectively developing the NOx purifying action thereof.
SOLUTION: This exhaust emission purifying catalyst contains a powder (I) wherein palladium is supported on a porous material on which 1-7, 2-15 and 2-15 wt.% of Ce, La and Zr are supported in terms of oxide so as to be at least partially compounded and a composite oxide powder (II) represented by formula and, per 1 l of the catalyst, 100-300 g of the powder I and 40-100 g of the powder II are contained. Further, this catalyst is used in a lean burn engine car repeating air/fuel ratios of 10-15 or 10-14.8 and 15-50.
Inventors:
Katsuo Suga
Hanaki Yasunari
Hanaki Yasunari
Application Number:
JP22589198A
Publication Date:
February 21, 2007
Filing Date:
August 10, 1998
Export Citation:
Assignee:
Nissan Motor Co., Ltd
International Classes:
B01D53/94; B01J23/89; B01J21/16; F01N3/10; B01J23/63; B01J23/84; B01J23/889; (IPC1-7): B01J23/63; B01D53/94; B01J21/16; B01J23/84; B01J23/889; F01N3/10
Domestic Patent References:
| JP9220471A | ||||
| JP10165819A | ||||
| JP5031367A | ||||
| JP63116742A | ||||
| JP6154606A | ||||
| JP8229355A | ||||
| JP10235192A | ||||
| JP11253803A | ||||
| JP11276892A | ||||
| JP11292539A | ||||
| JP9203315A |
Attorney, Agent or Firm:
Kosaku Sugimura
Hiroshi Tokunaga
Umemoto Masao
Juno Aoki
Hiroshi Tokunaga
Umemoto Masao
Juno Aoki