Title:
排ガス浄化用触媒層、排ガス浄化用触媒被覆構造体およびこれを使用した排ガス浄化方法
Document Type and Number:
Japanese Patent JP4058503
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an exhaust gas purifying catalyst bed capable of efficiently removing NOx in dilute combustion exhaust gas, a catalyst coated structure purifying exhaust gas and a method for purifying NOx in dilute combustion exhaust gas using them. SOLUTION: This catalyst A is obtained by adding silica and calcium, and if necessary, adding alumina and/or zirionia. This exhaust purifying catalyst constituted of the catalyst A and a catalyst B composed by adding silver to an alumina carrier having a pore structure wherein Y is 70% or more of X and Z is 20% or less of X when the total value of pore vol. occupying pores with a pore radius is 300Å or less is X and the total value of pore vol. occupying process with a pore radius of 25-100Å is Y and the total value of pore vol. occupying pores with a core radius of 100-300Å is Z in the relation of a pore radius and pore vol.
Inventors:
Taiji Sugano
Takeshi Chonan
Atsushi Katakei
Kunihide Chino
Takeshi Chonan
Atsushi Katakei
Kunihide Chino
Application Number:
JP28269597A
Publication Date:
March 12, 2008
Filing Date:
September 30, 1997
Export Citation:
Assignee:
NE Chemcat Co., Ltd.
International Classes:
B01D53/94; B01J21/04; B01J23/02; B01J23/50; B01J23/66; B01J27/053; B01J32/00; B01J35/10
Domestic Patent References:
| JP7313876A | ||||
| JP8131827A | ||||
| JP8224476A | ||||
| JP7275707A | ||||
| JP8024645A | ||||
| JP8071419A | ||||
| JP7275706A | ||||
| JP10113559A | ||||
| JP8299792A | ||||
| JP10118489A | ||||
| JP10128070A | ||||
| JP10137584A | ||||
| JP53062776A | ||||
| JP55022305A | ||||
| JP2547260B2 | ||||
| JP63185454A |
Attorney, Agent or Firm:
Yoshiteru Oshida