Fuel cell power plant with electrochemical autothermal reformer

H - Electricity – 01 – M

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H01M 8/06 (2006.01) H01M 8/04 (2006.01)

Patent

CA 2295830

A fuel cell power plant includes an electrochemical autothermal reformer (EATR) (200), which provides hydrogen to the fuel cell (100). The EATR includes an autothermal reformer region (210), an anode supply region (230), and a mixed ion conductor membrane or metal or metal alloy membrane layer (220) separating the autothermal reforming and anode supply regions. An anode gas loop (300), located between the anode supply region of the EATR and an anode compartment or section (110) of the fuel cell circulates a mixture of hydrogen and a carrier gas between the two regions. The carrier gas ensures proper control of partial pressures of hydrogen in the two regions. A difference in operating temperature between the EATR and the fuel cell is exploited by heat exchangers which efficiently enable certain heating and cooling functions within the power plant.

La présente invention concerne une centrale à pile à combustible comprenant un dispositif de reformage autothermique et électrochimique (EATR) (200) fournissant de l'hydrogène à la pile (100) à combustible. Le dispositif EATR comprend une zone de reformage autothermique (210), une zone d'alimentation anodique (230), une membrane (220) de conducteur à ions mixtes, une membrane métallique ou une couche membranaire (220) d'un alliage métallique séparant les zones de reformage autothermique et d'alimentation anodique. Une boucle de gaz (300) d'anode située entre la zone d'alimentation anodique du dispositif EATR et un compartiment ou une partie (110) anodique de la pile à combustible fait circuler un mélange d'hydrogène et d'un gaz porteur entre les deux zones. Le gaz porteur assure une bonne commande des pressions partielles de l'hydrogène dans les deux zones. Des échangeurs de chaleur exploitent une différence de température de fonctionnement entre le dispositif EATR et la pile à combustible, et permettent efficacement certaines fonctions de chauffage et de refroidissement dans la centrale.

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