Thermochemical production of hydrogen and oxygen from water

Details Thermochemical production of hydrogen and oxygen from water Thermochemical production of hydrogen and oxygen from water

1975-10-30

1977-05-31

Vertiz, O. R.

Chemistry of inorganic compounds

Oxygen or compound thereof

423648R, 423657, C01B 1300, C01B 100

Patent

active

040270033

ABSTRACT:
A process is disclosed which produces hydrogen and oxygen from water by means of a multi-step, closed, thermochemical cycle. Hydrogen and oxygen are produced at separate stations. Hydrogen and a halogen are produced by a sub-cycle involving transition metal or lanthanide compounds (depending on the halogen) and a hydrogen halide. Oxygen and the hydrogen halide are produced in a sub-cycle involving magnesium or transition metal compounds (depending on the halogen), the halogen and water. When the halogen is chlorine the transition metals in the oxygen producing sub-cycle can be nickel, cobalt, or yttrium and the lanthanide metals in the hydrogen producing sub-cycle can be samarium, europium, or ytterbium. When the halogen is bromine, the metals in the oxygen producing sub-cycle can be manganese or cobalt and the metals in the hydrogen producing sub-cycle can be vanadium or chromium.

REFERENCES:
patent: 3821358 (1974-06-01), Interrante et al.
patent: 3839550 (1974-10-01), Wenfort

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