Purification catalyst, preparation process therefor and...

Details Purification catalyst, preparation process therefor and... Purification catalyst, preparation process therefor and...

2007-05-29

2007-05-29

Nguyen, Cam N. (Department: 1754)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

C502S302000, C502S304000, C502S308000, C502S313000, C502S321000, C502S326000, C502S349000, C502S439000

Reexamination Certificate

active

10225792

ABSTRACT:
A purification catalyst and a gas-purifying apparatus are provided which are capable of sufficiently purifying a gas subject to treatment at low temperatures. The purification catalyst includes ZrO2having a specific surface area of 50 m2/g or less and a monoclinic crystal system. The gas-purifying apparatus includes the aforementioned purification catalyst as a first purification catalyst, and a second purification catalyst containing Mn as a major component and disposed upstream of the first purification catalyst.

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