METHOD FOR PURIFYING HYDROGEN FOR FUEL CELL

摘要

PROBLEM TO BE SOLVED: To effectively reduce the concn. of CO in CO-contg. gaseous hydrogen and to enable high efficiency operation of a fuel cell by adding oxygen-contg. gas to the CO-contg. gaseous hydrogen produce by a modification reaction of an org. compd. and bringing the resultant gaseous mixture into contact with a metal ruthenium-base catalyst with a mesoporous molecular sieve as the carrier. SOLUTION: The mesoporous molecular sieve is an inorg. porous body having a uniform pore diameter of 1.5-10nm in a mesoporous range and has the compsn. of silica or a multiple oxide contg. silicon and a metal, preferably Al. A ruthenium catalyst with the mesoporous molecular sieve as the carrier has such high activity and high selectivity that CO in gaseous hydrogen is selectively oxidized and removed at low temp. as well as at high temp. When the molecular sieve contains Al, the catalyst has remarkably improved CO removing activity and selectively at low temp., especially room temp. or below.