Dow Global Technolgoies LLC

Steven B Swatzmiller

Robin Paul Ziebarth

Martin C Cornell

Cheng G Li

An improved Diesel exhaust filter element of the type having a rigid porous wall portion formed of an acicular ceramic (such as acicular mullite), the porous wall portion having a first side and a second side, the porous wall portion being coated with a precious metal catalyst and a Noabsorbent, such that when exhaust gas from a Diesel engine is flowed through the rigid porous wall from the first side to the second side, the exhaust gas containing excess oxygen, Nox and soot, the soot in the exhaust gas in trapped within the rigid porous wall and catalytically oxidized to carbon dioxide, the NO is catalytically oxidized to NO, which NOis then absorbed by the Noabsorbent, and such that when the exhaust gas is caused to contain excess hydrocarbon and carbon monoxide, then the Noabsorbent is regenerated and the remaining hydrocarbon and carbon monoxide are catalytically converted to nitrogen and carbon dioxide. In addition, a process for depositing precipitated metal ions on the surfaces of such a rigid porous wall.

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Flemington, NJ, United States of America

Steven B Swatzmiller