Carbon monoxide removal method based on a regenerable co...

H - Electricity – 01 – M

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H01M 8/06 (2006.01) B01D 53/02 (2006.01) B01D 53/04 (2006.01)

Patent

CA 2290970

The present invention comprises a method for lowering the carbon monoxide content of a CO-containing hydrogen-rich gas stream by contacting the gas stream with a scavenger (21) capable of preferentially oxidizing the carbon monoxide in the gas stream, and then regenerating the scavenger. The scavenger is selected from the group of mixed oxides of manganese and copper; mixed oxides of manganese and copper in combination with mixed oxides of silver, nickel, iron and tin; mixed oxides of tin and copper; SnO2-CuO gels; and mixtures thereof. The scavenger will have a surface area from about 0.5 to about 200 m2/gm. The scavenger is housed in a CO separator (20), which provides the hydrogen to the anode (11) of a fuel cell (10).

L'invention concerne un procédé permettant de réduire la teneur en monoxyde de carbone d'un courant gazeux riche en hydrogène contenant du CO. Pour ce faire, on met en contact le courant gazeux avec un accepteur (21) capable d'oxyder de préférence le monoxyde de carbone dans un courant gazeux, puis on régénère l'accepteur. L'accepteur est sélectionné dans le groupe constitué d'oxydes mixtes de manganèse et cuivre; d'oxydes mixtes de manganèse et de cuivre en combinaison avec des oxydes mixtes d'argent, de nickel, de fer et d'étain; d'oxydes mixtes d'étain et de cuivre; de gels SnO2-CuO; et de mélanges de ceux-ci. L'accepteur présente une zone de surface comprise entre environ 0,5 et environ 200 m<2>/gm. L'accepteur est logé dans un séparateur CO (20) qui fournit l'hydrogène à l'anode (11) d'un élément à combustible (10).

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