Fuel blends for hydrogen generators

C - Chemistry – Metallurgy – 10 – L

Patent

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C10L 1/32 (2006.01)

Patent

CA 2550473

The present invention relates to improved aqueous fuels for hydrogen generators and a method for using them in the production of hydrogen. The present invention also relates to a system of using the subject aqueous fuels to generate hydrogen gas for use in a fuel cell or other device. The subject fuels contain a mixture of boron hydrides, at least one of which is a metal salt, including metal borohydrides, higher boranes and metal higher boron hydrides. The subject aqueous fuels contain a mixture of boron hydrides having a positive ionic charge (+IC) to boron ratio of between 0.2 and 0.4 or between 0.6 and 0.99. Preferred fuels contain a mixture of boron hydrides having an (+IC) to boron ratio between 0.2 and 0.3 or between 0.7 and 0.8. Mixtures containing a metal borohydride also contain a metal hydroxide to stability it against premature hydrolysis in the aqueous fuel media.

L'invention concerne des combustibles aqueux améliorés destinés à des générateurs d'hydrogène et un procédé d'utilisation de ceux-ci dans la production d'hydrogène. Cette invention concerne également un système d'utilisation de ces combustibles aqueux afin de générer un gaz d'hydrogène utilisé dans une cellule à combustible ou un autre dispositif. Ces combustibles contiennent un mélange de diboranes (6), au moins l'un d'eux consistant en un sel métallique, notamment du borohydrure métallique, des boranes supérieurs et des diboranes (6) supérieurs. Les combustibles aqueux de l'invention contiennent un mélange de diboranes (6) possédant une charge ionique positive (+IC) pour un rapport de bore compris entre 0,2 et 0,4 ou entre 0,6 et 0,99. Les combustibles préférés contiennent un mélange de diboranes (6) possédant un (+IC) pour un rapport de bore compris entre 0,2 et 0,3 ou entre 0,7 et 0,8. Les mélanges contenant les borohydrures métalliques contiennent également un hydroxyde de métal afin de les stabiliser contre l'hydrolyse prématurée dans un support combustible aqueux.

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