An apparatus removes carbon monoxide (CO) from a hydrogen-rich gas stream in a hydrogen fuel cell system. CO fouls costly catalytic particles in the membrane electrode assemblies of proton exchange membrane (PEM) fuel cells. A vessel houses a carbon monoxide adsorbent. The vessel may be a rotating pressure...http://www.google.com/patents/US20020110504?utm_source=gb-gplus-sharePatent US20020110504 - Carbon monoxide adsorption for carbon monoxide clean-up in a fuel cell system
