Steam reformer with internal hydrogen purification

Details Steam reformer with internal hydrogen purification Steam reformer with internal hydrogen purification

C - Chemistry, Metallurgy

01

B

C01B 3/50 (2006.01) B01D 53/34 (2006.01)

Patent

CA 2458314

A steam reformer includes a shell, a reforming region within the shell, and a hydrogen purification module. The shell has an outer surface and is adapted to receive a reforming feedstock containing water and at least one of a hydrocarbon and an alcohol. The reforming region within the shell includes a reforming catalyst bed adapted to receive the feedstock and convert the feedstock into a reforming product stream including hydrogen, carbon monoxide and carbon dioxide. The hydrogen purification module includes a hydrogen-selective membrane in fluid communication with the reforming catalyst bed. The membrane is adapted to produce a permeate stream comprised of a portion of the reforming product stream which passes through the membrane, and a byproduct stream comprised of a portion of the reforming product stream which does not pass through the membrane. The hydrogen-selective membrane includes palladium, copper and silicon, and contains no more than 39 ppm silicon.

Un reformeur à vapeur comprend une coquille, une zone de reformage dans la coquille, ainsi qu'un module de purification de l'hydrogène. La coquille possède une surface externe et est conçue pour recevoir des matières premières à reformer, contenant de l'eau et soit un hydrocarbure, soit un alcool. La zone de reformage dans la coquille renferme un lit de catalyse du reformage pouvant recevoir les matières premières et les convertir en un flux de produit de reformage contenant de l'hydrogène, du monoxyde de carbone et du dioxyde de carbone. Le module de purification de l'hydrogène comporte une membrane sélective à l'hydrogène dans un fluide de communication avec le lit de catalyse du reformage. La membrane est conçue pour produire un perméat comprenant une portion du flux de produit de reformage, qui la traverse, et un flux de sous-produit comprenant une portion du flux de produit de reformage, qui ne la traverse pas. La membrane sélective à l'hydrogène comporte du palladium, du cuivre et du silicium, et sa teneur en silicium ne dépasse pas 39 ppm.

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