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US 2006/0140831 A1Published application
Boron-alumina catalyst support
AssigneeUmicore AG & Co. KG
InventorBarry Southward
Life of this patent
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Abstract
In one embodiment, an oxidation catalyst can comprise a catalytic material disposed at a support. The support can comprise boron modified alumina and about 10 wt % to about 50 wt % zeolite, based upon the total weight of the support. The boron can be present in a sufficient amount to selectively poison a portion of the alumina to less than or equal to about 7 wt % boron, based upon a total weight of the alumina.
Claims13
An oxidation catalyst, comprising:
- a catalytic material disposed at a support, wherein the catalytic material is selected from the group consisting of platinum, palladium, iridium, rhodium, ruthenium, and alloys, and combinations comprising at least one of the foregoing catalytic materials;
- wherein the support comprises boron modified alumina and about 10 wt % to about 50 wt % zeolite, based upon the total weight of the support, and wherein the boron is present in a sufficient amount to selectively poison a portion of the alumina to less than or equal to about 7 wt % boron, based upon a total weight of the alumina.
A catalytic device, comprising;
- a housing disposed around a substrate;
- a compression ignition oxidation catalyst disposed at the substrate, the compression ignition oxidation catalyst comprising
- a catalytic material disposed at a support, wherein the catalytic material is selected from the group consisting of platinum, palladium, iridium, rhodium, ruthenium, and alloys, and combinations comprising at least one of the foregoing catalytic materials;
- and
- wherein the support comprises boron modified alumina and about 10 wt % to about 50 wt % zeolite, based upon the total weight of the support, and wherein the boron is present in a sufficient amount to selectively poison a portion of the alumina to less than or equal to about 7 wt % boron, based upon a total weight of the alumina.
2 more elements
A method for treating a compression ignition exhaust stream, comprising:
- introducing the compression ignition exhaust stream to a compression ignition oxidation catalyst;
- and
- oxidizing an exhaust stream component;
- wherein the compression ignition oxidation catalyst comprises
- a catalytic material disposed at a support, wherein the catalytic material is selected from the group consisting of platinum, palladium, iridium, rhodium, ruthenium, and alloys, and combinations comprising at least one of the foregoing catalytic materials;
- and
- wherein the support comprises boron modified alumina and about 10 wt % to about 50 wt % zeolite, based upon the total weight of the support, and wherein the boron is present in a sufficient amount to selectively poison a portion of the alumina to less than or equal to about 7 wt % boron, based upon a total weight of the alumina.
4 more elements
Dependencies are inferred from the claim text.