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Title:
排ガス浄化用触媒
Document Type and Number:
Japanese Patent JP5096200
Kind Code:
B2
Abstract:

To provide an exhaust gas cleaning catalyst early ingiting at a low temperature period.

The exhaust gas cleaning catalyst 9 includes: a carrier 1 having through-holes 3 axially penetrating; and catalyst-coated layers 11, 13, 15 which contain (a) Rh, (b) Pt and/or Pd, (c) a fire resistant inorganic oxide and are formed on the inner faces of the through-holes 3, wherein exhaust gas passages are formed by the through-holes 3, and a region A with the weight of the component (b) in the catalyst-coated layers larger than that of the component (a), a region B with the weight ratio of the component (a) to the component (b) in the catalyst-coated layers of 1:0-1.0, and a region C with the weight of the component (b) in the catalyst-coated layers larger than that of the component (a), are included in this order from upstream in relation to the flow direction of the exhaust gas. Among the flow passages, the volume of a part belonging to the region A is 6-40 vol.% of the total volume, and 30-80 wt.% of the total amount of the component (b) is contained in the catalyst-coated layers formed in the region A.

COPYRIGHT: (C)2010,JPO&INPIT


Inventors:
Shimizu Masanori
Application Number:
JP2008071372A
Publication Date:
December 12, 2012
Filing Date:
March 19, 2008
Export Citation:
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Assignee:
Cataler Co., Ltd.
International Classes:
B01D53/94; B01J23/63; F01N3/10; F01N3/28
Domestic Patent References:
JP2006205134A
JP61078438A
JP2005334801A
JP8206517A
JP10118457A
Attorney, Agent or Firm:
Nagoya International Patent Service Corporation



 
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