Hydrogen manufacture using pressure swing reforming

C - Chemistry – Metallurgy – 01 – B

Patent

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Details

C01B 3/24 (2006.01) C01B 3/26 (2006.01) C01B 3/38 (2006.01) C01B 3/46 (2006.01)

Patent

CA 2515014

The invention provides a method for generating high pressure hydrogen at improved thermal efficiencies. First a synthesis gas stream at a first pressure is produced in a pressure swing reformer (128). Next the synthesis gas stream is subjected to a high temperature water gas shift process (130) to produce a hydrogen enriched stream (131) from which high pressure hydrogen is obtained. Specific embodiments of the invention involve: regenerating the reformer at a pressure lower than the synthesis gas generation; operating the synthesis gas generation step at conditions sufficient to provide a syn gas stream at a temperature in the range used in the water gas shift reaction; and using pressure swing adsorption to separate the hydrogen.

L'invention concerne un procédé de fabrication d'hydrogène haute pression avec efficacité thermique améliorée. On produit d'abord un flux de gaz de synthèse à une première pression dans un reformeur à variation de pression (128). Ensuite, ce flux est soumis à un processus de conversion à la vapeur d'eau haute température (130), pour la production d'un flux enrichi en hydrogène (131), donnant de l'hydrogène haute pression. Selon des variantes spécifiques, on décrit la régénération du reformeur à une pression inférieure à celle de la production du gaz de synthèse, la production du gaz de synthèse dans des conditions suffisantes pour fournir un flux de gaz de synthèse à une température située dans la gamme utilisée pour la conversion à la vapeur d'eau, et l'utilisation de l'adsorption par variation de pression pour la séparation de l'hydrogène.

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