Exhaust inlet metallic foam trap coupled to a downstream monolithic precious metal catalyst
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United States of America Patent
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Apr 21, 2009
Grant Date -
Jul 12, 2007
app pub date -
Dec 22, 2005
filing date -
Dec 22, 2005
priority date (Note) -
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Abstract
The present invention is directed to an improved apparatus and method of minimizing catalyst poisoning from exhaust gas streams containing inorganic deposits and particulate matter. More specifically, the present invention is directed to an upstream metallic foam trap and a downstream monolithic precious metal catalyst, wherein the trap physically blocks inorganic deposits and particulate matter from poisoning the downstream catalyst. The present invention is also directed to a metallic foam trap containing a coat comprising a first metallic thermal arc sprayed layer and optionally a second refractory metal oxide.
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