Self-regulating hydrogen generator

B - Operations – Transporting – 01 – J

Patent

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Details

B01J 7/00 (2006.01) C01B 3/06 (2006.01) H01M 8/06 (2006.01)

Patent

CA 2339230

A hydrogen generating apparatus (10) that includes a reactant with a vapor phase at greater than atmospheric pressure. The apparatus (10) includes a tank (14) for housing the reactant, such as ammonia. Ammonia communicates with a reactor (22) having a solid reactant, such as lithium aluminum tetrahydride. A check valve (26) is located between the tank (14) and the reactor (22) and is used to control the flow of ammonia to the reactor (22). Heat generated by the reaction is useful in raising the temperature of the reactant in the tank (14). The reactor (22) can also include a gas flow enhancing material that facilitates gas flow through the reactor (22). A filter and getters (46, 50) are employed downstream of the reactor (22) to remove unwanted solids and impurities from the hydrogen gas stream.

Ce générateur d'hydrogène (10) est pourvu d'une cuve (14) contenant un réactif en phase vapeur à une pression supérieure à la pression atmosphérique, de l'ammoniac par exemple. Celui-ci est en communication avec un réacteur (22) renfermant un réactif solide, un tétrahydrure de lithium-aluminium, par exemple. Un clapet anti-retour (26), installé entre la cuve (14) et le réacteur (22) permet d'agir sur le débit d'ammoniac pénétrant dans le réacteur (22). La chaleur produite par la réaction fait s'élever la température du réactif dans la cuve (14). Le réacteur peut également être équipé d'un système d'augmentation du débit gazeux facilitant la circulation du gaz dans le réacteur (22). On utilise un filtre et des getters (46, 50) en aval du réacteur pour extraire de la veine gazeuse d'hydrogène des matières solides et des impuretés.

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