(JP2000086202-A)   NOVELTY - Treatment of a feed gas containing carbon monoxide (CO) and hydrogen (H2) comprises reacting the CO with oxygen (O2) in the presence of an iridium catalyst dispersed on a refractory inorganic oxide carrier, such that a product gas is produced with a volumetric content of CO that is less than that of the feed gas.    USE - For reducing the amount of CO in an H2-rich gaseous mixture by preferential oxidation of CO, e.g. in a fuel cell.    ADVANTAGE - An H2-rich gas stream is produced with a CO content reduced to a level suitable for use in a fuel cell. The stream is produced economically and efficiently, and the method can be incorporated into a vehicle power plant.    (US6162558-A)   NOVELTY - Treatment of a feed gas containing carbon monoxide (CO) and hydrogen (H2) comprises reacting the CO with oxygen (O2) in the presence of an iridium catalyst dispersed on a refractory inorganic oxide carrier, such that a product gas is produced with a volumetric content of CO that is less than that of the feed gas.    USE - For reducing the amount of CO in an H2-rich gaseous mixture by preferential oxidation of CO, e.g. in a fuel cell.    ADVANTAGE - An H2-rich gas stream is produced with a CO content reduced to a level suitable for use in a fuel cell. The stream is produced economically and efficiently, and the method can be incorporated into a vehicle power plant.    (JP3197881-B2)   NOVELTY - Treatment of a feed gas containing carbon monoxide (CO) and hydrogen (H2) comprises reacting the CO with oxygen (O2) in the presence of an iridium catalyst dispersed on a refractory inorganic oxide carrier, such that a product gas is produced with a volumetric content of CO that is less than that of the feed gas.    USE - For reducing the amount of CO in an H2-rich gaseous mixture by preferential oxidation of CO, e.g. in a fuel cell.    ADVANTAGE - An H2-rich gas stream is produced with a CO content reduced to a level suitable for use in a fuel cell. The stream is produced economically and efficiently, and the method can be incorporated into a vehicle power plant.