Bio-electrochemical process for producing hydrogen

Details Bio-electrochemical process for producing hydrogen Bio-electrochemical process for producing hydrogen

C - Chemistry, Metallurgy

25

B

C25B 1/02 (2006.01) C12P 3/00 (2006.01) C02F 11/02 (2006.01)

Patent

CA 2531682

A process for producing hydrogen from bio-oxidisable material is disclosed herein. The process comprises the steps of - introducing the bio-oxidisable material into a reactor provided with an anode and a cathode optionally separated by a cation exchange membrane and containing anodophilic bacteria in an aqueous medium; - applying a potential between the anode and cathode 0.05 and 1.5 volt, while maintaining a pH of between 3 and 9 in the aqueous medium; - collecting hydrogen gas at the cathode. The hydrogen production process can be intermittently switched to an electric power generation stage (biofuel cell) by adding oxygen to the cathode and separating the anode and cathode spaces by means of a cation exchange membrane.

L'invention concerne un processus permettant de produire de l'hydrogène à partir d'un matériau bio-oxydable. Ce processus comprend les étapes consistant à introduire le matériau bio-oxydable dans un réacteur équipé d'une anode et d'une cathode éventuellement séparées par une membrane cationique et contenant une bactérie anodophile dans un milieu aqueux, à appliquer un potentiel de 0,05 à 1, 5 volts entre l'anode et la cathode, en maintenant le pH du milieu aqueux entre 3 et 9, à collecter l'hydrogène gazeux au niveau de la cathode. On peut commuter ce processus de production d'hydrogène de manière intermittente avec une phase de production d'électricité (pile à biocombustible) en ajoutant de l'oxygène à la cathode et en séparant les espaces anodique et cathodique au moyen d'une membrane cathodique.

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