Means and method for reducing carbon dioxide to provide a produc

Details Means and method for reducing carbon dioxide to provide a produc Means and method for reducing carbon dioxide to provide a produc

1984-03-27

1985-06-18

Williams, Howard S.

Chemistry: electrical and wave energy

Processes and products

204 75, 204158R, 204252, 204296, 204263, 429111, C25B 304

Patent

active

045239819

ABSTRACT:
A process for reducing carbon dioxide to at least one useful product includes two redox couple electrolyte solutions separated by a first membrane having photosensitizers. The carbon dioxide to be reduced is separated from one of the redox couple electrolyte solutions by another membrane having a catalyst. Water provides hydrogen ions which participate in the reduction of carbon dioxide via a separator. In the operation both membranes are illuminated and produce excited solar sensitizers which cause electron transfer from a first redox solution to the second redox solution and then to the carbon dioxide to react with the hydrogen ions, reducing the carbon dioxide to provide at least one product.

REFERENCES:
patent: 4219342 (1980-08-01), Halmann
patent: 4240882 (1980-12-01), Ang et al.
patent: 4381978 (1983-05-01), Gratzel et al.
patent: 4427508 (1984-01-01), Lichtin
patent: 4427749 (1984-01-01), Graetzel et al.

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