Steam electrolysis

Details Steam electrolysis Steam electrolysis

C - Chemistry, Metallurgy

25

B

C25B 1/06 (2006.01)

Patent

CA 2561852

The present invention relates to a method of producing hydrogen comprising: contacting steam (20) with a proton conducting membrane (7) supported on a porous redox stable substrate (8), through said substrate (8). The membrane (7) is non-permeable to molecular gas and to oxide ions. A DC voltage is applied across an anode (15) coupled to the substrate side of the membrane and a cathode (9, 11) coupled to its other side so as to dissociate at least part of the steam (20), into protonic hydrogen and oxygen at said anode (15). The protonic hydrogen passes through the membrane and forms molecular hydrogen (23) at the cathode (9, 11).

La présente invention concerne un procédé permettant de produire de l'hydrogène, lequel procédé consiste : à mettre en contact de la vapeur (20) avec une membrane conductrice de protons (7) qui est maintenue sur un substrat stable poreux d'oxydoréduction (8), par l'intermédiaire dudit substrat (8). La membrane (7) est non perméable au gaz moléculaire et aux ions oxydes. Une tension continue est appliquée à travers une anode (15) reliée au côté substrat de la membrane et une cathode (9, 11) reliée à l'autre côté de la membrane de manière à dissocier au moins une partie de la vapeur et de l'oxygène au niveau de l'anode (15). L'hydrogène protonique traverse la membrane et forme l'hydrogène moléculaire (23) au niveau de la cathode (9, 11).

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