Patent ID: 7524358

Claim:
An adsorption apparatus for the removal of CO from a feed stream containing CO in an amount of less than 50 ppm, said apparatus comprising at least one adsorption vessel containing a CO adsorbent layer, the CO adsorbent having a ΔCO working capacity greater than or equal to 0.01 mmol/g, and a source which supplies said feed stream, wherein a) when said feed stream further contains at least one gas selected from the group consisting of nitrogen, He, Ne, Ar, Xe, Kr, CH 4 and mixtures thereof, said adsorbent is ion exchanged with a Group IB element; or b) when said feed stream further contains at least one gas selected from the group consisting of oxygen and air and mixtures thereof, said adsorbent is a zeolite having a SiO 2 /Al 2 O 3 ratio of <20, and is ion-exchanged with a Ag + or Au + .