Patent ID: 7261866

Claim:
A CO remover, comprising: an air mixer for mixing air with hydrogen-rich gas including CO to generate mixed gas; and a selective oxidative catalytic device for selectively oxidizing the CO by having the mixed gas pass through a selective oxidative catalyst bed, the selective oxidative catalytic device including: a gas passing tube that has the selective oxidative catalyst bed, a gas blending unit within the selective oxidative catalyst bed for blending part of the mixed gas that is passing through the selective oxidative catalyst bed further from an inner surface of the gas passing tube and remaining part of the mixed gas that is passing through the selective oxidative catalyst bed nearer to the inner surface of the gas passing tube, and a double-walled cylinder with an annular clearance formed therebetween, the cylinder being disposed upstream from the gas blending unit, and a cooling mechanism for cooling the selective oxidative catalyst bed with cooling water passing through the annular clearance wherein the gas blending unit is formed from an element projecting inward from the inner surface of the gas passing tube so as to partially obstruct the gas passing tube.