Chemistry of inorganic compounds – Hydrogen or compound thereof – Elemental hydrogen
Patent
1982-01-28
1984-10-09
Doll, John
Chemistry of inorganic compounds
Hydrogen or compound thereof
Elemental hydrogen
55 3, 423579, C01B 1300
Patent
active
044761058
ABSTRACT:
The invention is an improved process for producing gaseous hydrogen and oxygen from water. The process is conducted in a photolytic reactor which contains a water-suspension of a photoactive material containing a hydrogen-liberating catalyst. The reactor also includes a volume for receiving gaseous hydrogen and oxygen evolved from the liquid phase. To avoid oxygen-inactivation of the catalyst, the reactor is evacuated continuously by an external pump which circulates the evolved gases through means for selectively recovering hydrogen therefrom. The pump also cools the reactor by evaporating water from the liquid phase. Preferably, product recovery is effected by selectively diffusing the hydrogen through a heated semipermeable membrane, while maintaining across the membrane a magnetic field gradient which biases the oxygen away from the heated membrane. This promotes separation, minimizes the back-reaction of hydrogen and oxygen, and protects the membrane.
REFERENCES:
patent: 4053576 (1977-10-01), Fletcher
Babor, Basic College Chemistry, Second Edition, Thomas Y. Crowell Company (1953), pp. 274-276.
E. Greenbaum, "Simultaneous Photoproduction of Hydrogen and Oxygen by Photosynthesis", Biotechnology and Bioengineering Symposium No. 10, John Wiley & Sons, 1980.
Curl, "Direct Thermomagnetic Splitting of Water," Int. J. Hydrogen Energy, vol. 4, pp. 13-20, Permagon Press Ltd., 1979.
Doll John
Esposito Michael F.
Hamel Stephen D.
Langel Wayne A.
Lewis Fred O.
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