Process for selective oxidation of carbon monoxide in a hydrogen containing stream

A process for oxidizing carbon monoxide with oxygen to carbon dioxide comprises:

• (a) contacting a feed stream comprising carbon monoxide, hydrogen and oxygen with a composition comprising platinum and iron in a contacting zone at an operating temperature in the range of from about 60° C. to about 100° C., so as to produce a product stream comprising less carbon monoxide than said feed stream, for a prolonged period of time until said composition is at least partially deactivated thereby forming an at least partially deactivated composition;
• (b) increasing the temperature of said contacting zone such that said feed stream is contacted with said at least partially deactivated composition at a regeneration temperature in the range of from 150° C. to 250° C. to thereby form an at least partially regenerated composition;
• and
• (c) decreasing the temperature of said contacting zone such that said feed stream is contacted with said regenerated composition at said operating temperature in the range of from about 60° C. to about 100° C.