Method and device for producing a gas rich in hydrogen by...

C - Chemistry – Metallurgy – 01 – B

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C01B 3/24 (2006.01) B01J 19/00 (2006.01) B01J 19/24 (2006.01) C01B 3/22 (2006.01) C01B 3/50 (2006.01) C01B 31/02 (2006.01)

Patent

CA 2453841

The invention concerns a method for producing a gas rich in hydrogen by thermal pyrolysis of hydrocarbons which consists in carrying out, in a reactor (R) a catalyst-free thermal cracking to pyrolyze a fuel selected so as to produce either a gas rich in hydrogen and free of carbon monoxide, or a gas rich in hydrogen and containing carbon monoxide and in using said gas effluents during pyrolysis and inert with respect to the cell as fuel at the burner (B) to heat the reactor so as to bring it to a reaction temperature, and which consists, subsequently, in burning the powder carbon produced in the reactor (R) during the pyrolysis reaction either to produce carbon monoxide or to produce carbon dioxide. The invention is useful in particular for supplying hydrogen to fuel cells and for producing synthesis gas.

Le procédé de production d'un gaz riche en hydrogène par pyrolyse thermique d'hydrocarbures selon l'invention d'une part, consiste à effectuer, dans un réacteur (R) un craquage thermique, sans catalyseur, pour pyrolyser un combustible choisi de manière à produire soit un gaz riche en hydrogène et exempt de monoxyde de carbone, soit un gaz riche en hydrogène et contenant du monoxyde de carbone et à utiliser les gaz effluents produits au cours de la pyrolyse et inertes vis à vis de la pile en tant que combustible au niveau du brûleur (B) pour assurer le chauffage du réacteur en vue de le porter à la température de réaction, et d'autre part, consiste à effectuer, à la suite, une combustion du carbone pulvérulent produit dans le réacteur (R) lors de la réaction de pyrolyse soit de façon à produire du monoxyde de carbone soit de façon à produire du dioxyde de carbone. L'invention s'applique notamment à l'alimentation en hydrogène de piles à combustibles et à la production de gaz de synthèse.

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