Title:
CATALYST FOR PURIFYING EXHAUST GAS
Document Type and Number:
Japanese Patent JP3110921
Kind Code:
B2
Abstract:
PURPOSE: To provide a catalyst for purifying exhaust gas capable of purifying nitrogen oxide to a harmless gas at high efficiency even if the oxygen conc. in the exhaust gas is high.
CONSTITUTION: The catalyst is composed of a carrier carrying copper component and phosphorus component (phosphor, phosphorus compound) containing a pentasyl type (constitution unit is oxygen 5-members ring) crystalline aluminosilicate. The carrying quantity of phosphorus component is 0.01-6.0wt.% in terms of P2O5 and ≤0.7 in the ratio of phosphorus to copper (P/Cu mol ratio). The exhaust gas is purified by using the catalyst in an oxidizing atmosphere at 200-800°C reaction temp. in the presence of hydrocarbon of 0.5-200 THC conc./NOX conc.
Inventors:
Yasuhide Kano
Yoshimi Kawashima
Toshiaki Hayasaka
Hiroshi Akama
Yoshimi Kawashima
Toshiaki Hayasaka
Hiroshi Akama
Application Number:
JP17032593A
Publication Date:
November 20, 2000
Filing Date:
July 09, 1993
Export Citation:
Assignee:
IDEMITSU KOSAN CO.,LTD.
Nissan Motor Co., Ltd
Nissan Motor Co., Ltd
International Classes:
B01D53/94; B01J29/46; (IPC1-7): B01J29/46; B01D53/94
Domestic Patent References:
| JP6277522A | ||||
| JP44238A | ||||
| JP44045A |
Attorney, Agent or Firm:
Minoru Kinoshita (2 outside)