Simplified article for carbon monoxide removal
AssigneeEngelhard Corporation
InventorLawrence Shore
Life of this patent
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Abstract
Provided are improved carbon monoxide removal articles and processes for treating hydrogen gas streams to achieve very low threshold levels of carbon monoxide. The articles have a substrate with an inlet end, an outlet end, a length extending between the inlet end to the outlet end, wall elements and a plurality of cells defined by the wall elements. A first layer is deposited on the wall elements from the inlet end and extending at least partially toward the outlet end. The first layer has a preferential carbon monoxide oxidation catalyst. A second layer contains a methanation catalyst, and is deposited on at least part of the first layer from the outlet end. The second layer has a length that is about 10-70% of the substrate length.
Claims20
An article, comprising:
- a substrate comprising an inlet end, an outlet end, a length extending between the inlet end to the outlet end, wall elements and a plurality of cells defined by the wall elements;
- a first layer deposited on the wall elements from the inlet end and extending at least partially toward the outlet end, wherein the first layer comprises a preferential carbon monoxide oxidation catalyst, wherein the preferential carbon monoxide oxidation catalyst is a platinum-metal based catalyst, a palladium metal-based catalyst, or a mixture of thereof, the platinum-metal based catalyst consisting of about 1 to 5 wt. % of platinum, a support and an optional promoter, and the palladium metal-based catalyst consisting of about 1 to 5 wt. % of palladium, a support and an optional promoter;
- and
- a second layer deposited on at least part of the first layer from the outlet end and having a length that is about 10-70% of the wall elements' length, the second layer comprises a methanation catalyst consisting of a ruthenium component and a support.
An article, comprising:
- a substrate comprising an inlet end, an outlet end, wall elements having a length extending between the inlet end to the outlet end, and a plurality of axially enclosed cells defined by the wall elements;
- a first layer deposited on the substrate from the inlet end and extending at least partially toward the outlet end, wherein the first layer comprises a platinum-based, iron-promoted catalyst consisting of platinum, iron and a support;
- and
- a second layer deposited on at least part of the first layer from the outlet end and having a length that is about 10-70% of the wall elements' length, the second layer overlaying the first layer for a length of at least about 10% of the wall elements' length, wherein the second layer comprises a methanation catalyst consisting of ruthenium and an alumina support.
Dependencies are inferred from the claim text.