Patent ID: 7118717

Claim:
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.