Katalysator, Verfahren zu dessen Herstellung und dessen Verwendung

US 20070129247 A1 UPAB: 20070822 NOVELTY - A low temperature selective carbon monoxide oxidation catalyst comprises (wt.%) platinum (1 - 20) and cobalt (1 - 30). DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) an ambient temperature selective carbon monoxide oxidation catalyst comprising (wt.%) platinum (1 - 10) and cobalt (1 - 4), where the catalyst has a greater than 50% conversion efficiency at 22 and 33degreesC; (2) a preferential carbon monoxide catalyst comprising Pt/Co ratio at a constant platinum loading of 1:2 - 4:1 wt.%; (3) a respiratory protection system comprising the preferential CO oxidation catalyst and a support structure of beta-zeolite or zirconium phosphate; and (4) producing a catalyst involving coimpregnating at least one platinum precursor and at least one cobalt precursor so as to deposit platinum and cobalt as catalytic components in an acidic medium onto a support structure; drying and calcining the support structure. USE - For oxidation of carbon monoxide at low temperatures (claimed); for removal of carbon monoxide from hydrogen rich gas for fuel cell technology; in automobile sector for removal of carbon monoxide during cold starting of a diesel or petrol engine, and also in air purification systems for quality control of air in interior spaces, for e.g. removal of CO in a tunnel, underground railway, multistory car parks and submarines. ADVANTAGE - The catalyst has conversion efficiency of greater than 90% at less than or equal to140 (preferably less than 90)degreesC. The process has a preferential CO oxidation activity of greater than 50% at 22 - 33 (preferably less than or equal to30)degreesC. The catalyst effectively oxidizes carbon monoxide at low temperature; and removes CO from hydrogen rich gas thus avoiding poisoning of the electrode