Exhaust gas purifying catalyst

Details Exhaust gas purifying catalyst Exhaust gas purifying catalyst

1998-01-16

2000-11-21

Tran, Hien

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Waste gas purifier

422171, 422177, 422222, B01D 5334

Patent

active

061498777

ABSTRACT:
In an exhaust gas purifying catalyst, a catalyst supporting layer is formed on a surface of a cell wall of a honeycomb base member, and a catalytic noble metal and a NOx adsorbing material are loaded on the catalyst supporting layer. The portion of the catalyst supporting layer present within a depth of 100 .mu.m constitutes at least 80% by volume relative to a total volume of the catalyst supporting layer. The catalyst maintains a high probability of contact of emissions with the NOx adsorber and the catalytic noble metal, and allows easy decomposition of the sulfuric acid salt produced by sulfur poising of the NOx adsorber, thereby ensuring reliable recovery of the NOx purifying performance.

REFERENCES:
patent: 3441381 (1969-04-01), Keith et al.
patent: 4335023 (1982-06-01), Dettling et al.
patent: 4476246 (1984-10-01), Kim et al.
patent: 4522792 (1985-06-01), Brennan
patent: 5162287 (1992-11-01), Yoshimoto et al.

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