Hydrogen production via the direct cracking of hydrocarbons

C - Chemistry – Metallurgy – 01 – B

Patent

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C01B 3/26 (2006.01) D01F 9/127 (2006.01)

Patent

CA 2317395

A process for producing substantially pure hydrogen by contacting a stream of a hydrocarbon gas with a nickel or nickel-copper containing catalyst at a temperature in the range of about 400 to 900 ~C. This results in the conversion of the hydrocarbon gas to substantially pure hydrogen, with said process being carried out until the catalyst is deactivated due to the deposition of carbon on the catalyst. The deactivated catalyst may be regenerated by oxidation in air or by steam gasification of the deposited carbon. The carbon deposited on the catalyst also has separate utility for electrochemical and fuel storage applications and may be recovered for further use.

Le procédé faisant l'objet de cette invention, qui sert à produire de l'hydrogène sensiblement pur, consiste à mettre en contact un flux d'hydrocarbure gazeux avec un catalyseur à teneur en nickel ou en cuivre-nickel à une température comprise entre environ 400 et 900 ·C. On obtient ainsi la conversion de l'hydrocarbure gazeux en hydrogène sensiblement pur, ce procédé étant prolongé jusqu'à ce que le catalyseur soit désactivé en raison du dépôt de carbone sur ledit catalyseur. Le catalyseur ainsi désactivé peut être régénéré par oxydation dans de l'air ou par gazéification à la vapeur du carbone déposé. Le carbone déposé sur le catalyseur a également une utilité séparée dans des applications électrochimiques et de stockage de carburant et il peut être récupéré pour un usage ultérieur.

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