Electrochemical autothermal reformer

Details Electrochemical autothermal reformer Electrochemical autothermal reformer

C - Chemistry, Metallurgy

25

F

C25F 5/00 (2006.01) H01M 8/06 (2006.01)

Patent

CA 2295804

An electrochemical autothermal reformer (EATR) provides hydrogen. The EATR includes an autothermal reformer region, a reformer anode supply region, and a composite membrane layer (10) separating the reformer anode from the autothermal reformer region. The composite membrane layer (10) includes a mechanically stable porous ceramic support member (12) with a thin gas permeable ceramic substrate layer (14) overlaying the support member (12). Overlaying the substrate layer (14) is a first thin metallic first catalyst layer (16) which promotes the dissociation of H2 to 2H+ + 2e-. Overlaying the first catalyst layer (16) is a metallic oxide layer (18) capable of conducting 2H+ + 2e- at elevated temperatures. Overlaying the metallic oxide layer (18) is a second thin metallic catalyst layer (20) which promotes the recombination of 2H+ + 2e- to H2.

La présente invention concerne un dispositif de reformage autothermique et électrochimique (EATR) permettant d'obtenir de l'hydrogène. Le EATR comprend une zone de reformage autothermique, une zone d'alimentation anodique de reformage, une couche membranaire composite (10) séparant l'anode de reformage de la zone de reformage autothermique. La couche membranaire composite (10) comprend un élément de support (12) mécaniquement stable en thermomousse, une couche (14) de substrat en céramique perméable au gaz recouvrant l'élément de support (16). Une première couche (16) de catalyseur métallique mince recouvre la couche de substrat (14), la première couche (16) favorisant la dissociation du H¿2? en 2H?+¿ + 2e?-¿. Une couche (18) d'oxyde métallique capable de conduire 2H?+¿ + 2e?-¿ à des températures élevées recouvre la première couche (16) de catalyseur. Une seconde couche (20) de catalyseur métallique mince recouvre la couche (18) d'oxyde métallique, la seconde couche (20) favorisant la recombinaison de 2H?+¿ + 2e?-¿ en H¿2?.

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