Process for reducing concentration of carbon monoxide in hydrogen-containing gas

A process for reducing a concentration of carbon monoxide in a hydrogen-containing gas adapted for use in fuel cells, comprising the step of contacting the carbon monoxide in said hydrogen-containing gas adapted for use in fuel cells with oxygen at a temperature of 40 to 200° C. in the presence of a catalyst consisting of nickel and platinum, supported on a carrier, such that the amount of the oxygen contacted is 0.5 to 2 times the amount of the carbon monoxide contained in the hydrogen-containing gas.

A process for reducing a concentration of carbon monoxide in a hydrogen-containing gas adapted for use in fuel cells, comprising the step of contacting the carbon monoxide in said hydrogen-containing gas adapted for use in fuel cells with oxygen at a temperature of 100 to 200° C. in the presence of a catalyst consisting of copper and platinum, supported on a carrier, such that the amount of the oxygen contacted is 0.5 to 4 times the amount of the carbon monoxide contained in the hydrogen-containing gas.

A process for reducing a concentration of carbon monoxide in a hydrogen-containing gas adapted for use in fuel cells, comprising the step of contacting the carbon monoxide in said hydrogen-containing gas adapted for use in fuel cells with oxygen at a temperature of 40 to 200° C. in the presence of a catalyst consisting of manganese and platinum, supported on a carrier, such that the amount of the oxygen contacted is 0.5 to 2 times the amount of the carbon monoxide contained in the hydrogen-containing gas.

A process for reducing a concentration of carbon monoxide in a hydrogen-containing gas adapted for use in fuel cells, comprising the steps of contacting the carbon monoxide in said hydrogen-containing gas adapted for use in fuel cells with oxygen at a temperature of 40 to 200° C. in the presence of a catalyst consisting of (a) at least one selected from the group consisting of cobalt, nickel, copper and manganese, and also (b) platinum, the catalyst being supported on a carrier, such that the amount of the oxygen contacted is 0.5 to 2 times the amount of the carbon monoxide contained in the hydrogen-containing gas.

A process for reducing a concentration of carbon monoxide in a hydrogen-containing gas adapted for use in fuel cells, comprising the steps of contacting the carbon monoxide in said hydrogen-containing gas adapted for use in fuel cells with oxygen at a temperature of 40 to 200° C. in the presence of a catalyst consisting of (a) at least one selected from the group consisting of cobalt, nickel, copper and manganese, and also (b) platinum, the catalyst being in a form of a coprecipitated catalyst, such that the amount of the oxygen contacted is 0.5 to 2 times the amount of the carbon monoxide contained in the hydrogen-containing gas.

A process for reducing a concentration of carbon monoxide in a hydrogen-containing gas adapted for use in fuel cells, comprising the steps of contacting the carbon monoxide in said hydrogen-containing gas adapted for use in fuel cells with oxygen at a temperature of 40 to 200° C. in the presence of a catalyst, the catalyst consisting of (a) at least one selected from the group consisting of cobalt, nickel, copper and manganese, and also (b) platinum, such that the amount of the oxygen contacted is 0.5 to 2 times the amount of the carbon monoxide contained in the hydrogen-containing gas.