Exhaust gas cleaning catalyst

Details Exhaust gas cleaning catalyst Exhaust gas cleaning catalyst

2004-07-13

2009-06-16

Nguyen, Cam N. (Department: 1793)

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

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

C502S302000, C502S303000, C502S304000, C502S332000, C502S333000, C502S334000, C502S339000, C502S349000, C502S350000, C502S355000, C502S415000, C502S439000, C502S527120, C502S527130

Reexamination Certificate

active

07547656

ABSTRACT:
An exhaust gas cleaning catalyst comprising: a carrier substrate; a catalyst carrying layer formed on the carrier substrate; and a noble metal catalyst carried by the catalyst carrying layer; wherein said catalyst carrying layer comprises at least two layers, and of the at least two layers, lower layer on the side of the carrier substrate is a metal oxide layer with porosity of 40˜75% and upper layer on the side of the top surface is a metal oxide layer having thermal conductivity of 5 W/mK or less.

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