Hydrogen management system for metal/air fuel cell

Chemistry: electrical current producing apparatus – product – and – Having magnetic field feature

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429 22, 429 27, 429 58, H01M 806

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054298857

ABSTRACT:
A process for controlling the hydrogen that evolves as a parasitic by-product during the operation of a metal/air fuel cell which comprises feeding into a catalytic recombiner a gaseous stream containing hydrogen being discharged from the metal/air cell together with an amount of oxygen sufficient to convert the hydrogen to water, said oxygen gas concentration being monitored and adjusted to maintain an oxygen concentration in the gaseous stream entering the recombiner in the range of 1.5 to 2.5% by volume. The process is of particular value in closed system aluminum/oxygen fuel cells in which small amounts of hydrogen must be removed, e.g. the sealed hull of an underwater vehicle.

REFERENCES:
patent: 3840403 (1974-10-01), George et al.
patent: 4735872 (1988-04-01), Maimoni
patent: 4994332 (1991-02-01), Coin et al.
patent: 5156925 (1992-10-01), Lapp
D. Gibbons and K. Gregg, ELTECH Research Corporation, "Closed Cycle Aluminum/Oxygen Fuel Cell with Increased Mission Duration", 1992 IEEE (month unknown) 35th International Power Sources Symposium: Hyatt Cherry Hill, Cherry Hill, N.J., Jun. 22-25, 1992, p. 405.

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