Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1979-11-05
1981-11-17
Williams, Howard S.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
204128, 204265, 204266, 204277, 204278, C25B 100, C25B 106, C25B 110, C01B 1300
Patent
active
043009875
ABSTRACT:
An electrochemical cell used to separate gas from a gaseous mixture by reduction of said gas at the cathode and regeneration of said gas at the anode is characterized in that one or more substances formed during the cathodic reduction and/or the anodic regeneration is chemically converted, preferably by catalytic decomposition, to produce further quantities of said gas, the gas formed by both the anodic regeneration and the chemical conversion being recovered as the product. In an especially preferred embodiment a plurality of said cells are used in apparatus for extracting oxygen from the air by using a cathode comprising high surface area graphite powder which reduces oxygen to produce peroxyl ions, each cell being further provided, externally of the cathode compartment, with means for catalytically decomposing the peroxyl ions produced, suitable catalysts being CoFe.sub.2 O.sub.4 or NiCo.sub.2 O.sub.4.
REFERENCES:
patent: 2390591 (1945-12-01), James
patent: 4061554 (1977-12-01), Chillier-Duchatel
patent: 4132619 (1979-01-01), Klein et al.
Electrochimica Acta, 1976, vol. 21, p. 567 "Oxygen Reduction on Ultra Thin Carbon", by Appelby and Savy.
Electro-Analytical Chemistry and Interfacial Electro-chemistry, 42 (1973) 347, Taylor and Humffray, "Electro-Chemical Studies on Glassy Carbon Electrodes".
Jasem Sameer M.
Tseung Alfred C. C.
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