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.
Claims12
An apparatus for supplying a hydrogen stream to a fuel cell, said apparatus comprising a hydrocarbon reformer reactor, a water-gas shift reactor, and an article for removing carbon monoxide in the hydrogen stream, wherein the article comprises:
- 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;
- 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;
- wherein the hydrocarbon reformer reactor is upstream and in train with the water-gas shift reactor, and the article for removing the carbon monoxide is downstream and in train with the water-gas shift reactor.
Dependencies are inferred from the claim text.