Filter catalyst for purifying exhaust gases and its...

Details Filter catalyst for purifying exhaust gases and its... Filter catalyst for purifying exhaust gases and its...

2007-12-11

2007-12-11

Caldarola, Glenn (Department: 1764)

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Waste gas purifier

C422S178000, C422S180000, C422S168000, C502S527130, C502S527120, C055S523000, C048S128000

Reexamination Certificate

active

10660707

ABSTRACT:
A filter catalyst for purifying exhaust gases having a catalytic layer comprising the first catalyst support2having an average particle diameter of 1 μm or less, the second catalyst support3having an average particle diameter from 1/20 to ½ of the average pore diameter of the filter cellular walls12and catalytic ingredients, on the filter cellular walls12having an average pore diameter of from 20 to 40 μm, and the catalytic layer having uneven surfaces is used. Since the second catalyst support hardly enters into the pore with a diameter of 20 μm or less, it exists partly on the filter cellular walls and the inside surface of the wall. Therefore, since particles collide with the convex part of the catalytic layer, it becomes possible to collect them easily and the collecting rate for particles and the ability of the particles purification are improved.

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