Producing metal and carbon dioxide with hydrogen recycle

Details Producing metal and carbon dioxide with hydrogen recycle Producing metal and carbon dioxide with hydrogen recycle

C - Chemistry, Metallurgy

21

B

C21B 5/00 (2006.01) C01B 3/06 (2006.01) C21B 7/00 (2006.01) F27D 17/00 (2006.01)

Patent

CA 2753297

Offgas containing carbon dioxide and carbon monoxide that is produced in the reduction of ores and other metal oxides in a reactor is treated to reduce its carbon dioxide content and is then contacted with metal oxide to reduce the oxidation state of the metal and oxidize carbon monoxide therein to carbon dioxide, following which the reduced metal is oxidized with steam to produce hydrogen that can be fed to the reactor.

Selon l'invention, un gaz d'échappement contenant du dioxyde de carbone et du monoxyde de carbone qui est produit dans la réduction des minerais et d'autres oxydes métalliques dans un réacteur est traité pour réduire sa teneur en dioxyde de carbone, puis est mis en contact avec un oxyde métallique pour réduire l'état d'oxydation du métal et oxyder le monoxyde de carbone qui y est contenu en dioxyde de carbone, après quoi le métal réduit est oxydé par de la vapeur d'eau pour produire de l'hydrogène qui peut être introduit dans le réacteur.

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