Solar photolysis of water

Details Solar photolysis of water Solar photolysis of water

1977-09-30

1978-08-08

Williams, Howard S.

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

250527, B01J 110

Patent

active

041055179

ABSTRACT:
A cyclic process for the solar photolysis of water includes a first stage in which water is reduced in the presence of a Eu.sup.+2 photo-oxidizable reagent producing hydrogen and spent oxidized Eu.sup.+3 reagent. The spent reagent (Eu.sup.+3) is reduced by means of a transition metal ligand complex reductant, *RuL.sup.+3 in a photoexcited state, such as a ruthenium pyridyl complex. Due to competing reactions between the photolysis and regeneration products, the photo-oxidation reaction must be separated from the regeneration in space and time by supporting the reagent and/or the reductant on solid supports and utilizing pH, wavelength and flow control to maximize hydrogen and oxygen production.

REFERENCES:
patent: 4045315 (1977-08-01), Ryason
C & E News, Aug. 1, 1977, pp. 15 & 16.

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