Removal of particulates from the exhaust gas of internal...

Details Removal of particulates from the exhaust gas of internal... Removal of particulates from the exhaust gas of internal...

2008-09-26

2011-11-29

Lorengo, Jerry (Department: 1731)

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Mixture is exhaust from internal-combustion engine

C423S212000, C423S235000, C423S239100, C423S245100, C423S245300, C423S246000, C423S247000, C502S300000, C502S325000, C502S332000, C502S333000

Reexamination Certificate

active

08066963

ABSTRACT:
The exhaust gas of internal combustion engines operated with a predominantly stoichiometric air/fuel mixture contains, as well as the gaseous hydrocarbon (HC), carbon monoxide (CO) and nitrogen oxide (NOx) pollutants, also ultrafine particulates. There is disclosed a catalytically active particulate filter, an exhaust gas cleaning system and a process for cleaning the exhaust gases of predominantly stoichiometrically operated internal combustion engines, as well as the gaseous CO, HC and NOxpollutants, also for removing particulates from the exhaust gas. The particulate filter comprises a filter body and a catalytically active coating consisting of two layers. Both layers contain alumina. The first layer contains palladium. The second layer contains rhodium. The latter is disposed above the first layer.

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