Thermochemical hydrogen produced from a vanadium...

C - Chemistry – Metallurgy – 01 – B

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C01B 3/08 (2006.01) C01G 23/02 (2006.01)

Patent

CA 2570244

A thermochemical water-splitting process all reactions of which operate at relatively low temperatures and high efficiencies, and in which relatively inexpensive materials and processing methods are made possible. This invention involves the decomposition of a metal halide compound, i.e., one which is capable of being reduced from a higher oxidation state to lower oxidation state, e.g. vanadium chloride III vanadium dichloride. The process is cyclic and regenerative, and the only net inputs are water and heat; and the only net outputs are hydrogen and oxygen. The process makes it possible to utilize a wide variety of available heat, including solar, sources for the energy input.

L'invention concerne un processus de séparation d'eau thermochimique, dont toutes les réactions s'effectuent à des températures relativement basses et avec une efficacité élevée, et dans lequel peuvent être utilisés des matières et des procédés de traitement relativement peu coûteux. Le processus de cette invention implique la décomposition d'un composé d'halure métallique, à savoir, d'un composé qui peut être réduit d'un état d'oxydation supérieur à un état d'oxydation inférieur, par exemple, du chlorure de vanadium III en dichlorure de vanadium. Le processus est cyclique et régénératif et les seules entrées pures constituent l'eau et la chaleur, et les seules sorties pures constituent l'hydrogène et l'oxygène. Ledit processus rend possible l'utilisation d'une large diversité de chaleur disponible, y compris, des sources solaires d'entrée d'énergie.

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