Fluidized-bed electrodes and related apparatus and methods

Details Fluidized-bed electrodes and related apparatus and methods Fluidized-bed electrodes and related apparatus and methods

1977-12-01

1980-02-26

Skapars, Anthony

Chemistry: electrical current producing apparatus, product, and

Having magnetic field feature

429 27, 429 34, H01M 804

Patent

active

041907035

ABSTRACT:
The current-carrying capacity of a fluidized-bed electrode is enhanced by imparting increased velocities to the particles suspended therein while maintaining a relatively low degree of bed expansion or voidage. This is accomplished in one embodiment of the invention by means of pairs of opposing jets of electrolyte impinging against each other so as to effect a highly turbulent motion of the fluidized particles while the net flow velocity of the supporting electrolyte is kept relatively low. In a second preferred embodiment, the electrolyte flow velocity may be as high as desired, but its direction, preferably horizontal, is reversed at frequent intervals. The suspended particles get thereby intermittently packed against and retained by filters at the alternating outlet walls. The alternating packing and expansion result in improved charge and mass transport, and hence in improved electrode performance.
The above improvement is especially applicable to fluidized beds of activated carbon particles and of other materials whose specific gravity is not much higher than that of the supporting electrolyte.

REFERENCES:
patent: 3767466 (1973-10-01), McCoy et al.
patent: 3840405 (1974-10-01), d'Orsay
patent: 3879225 (1975-04-01), Backhurst et al.
patent: 3981747 (1976-09-01), Doniat et al.

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