Electrochemical hydrogen compressor for electrochemical cell...

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

Reexamination Certificate

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C205S637000, C204S277000, C204S278000

Reexamination Certificate

active

06994929

ABSTRACT:
In one embodiment, an electrochemical cell system comprises: a fuel cell stack comprising a fuel cell having a fuel cell hydrogen inlet and a fuel cell hydrogen outlet, and a first electrochemical hydrogen compressor in fluid communication with the fuel cell hydrogen outlet, wherein the first electrochemical hydrogen compressor comprises electrodes in electrical communication with an electricity source, and a compressed hydrogen outlet in fluid communication with the fuel cell hydrogen inlet. In one embodiment, the method of operating the electrochemical cell system comprises: introducing hydrogen feed to a fuel cell at a feed rate of greater than stoichiometry, directing excess hydrogen from the fuel cell to a first electrochemical hydrogen compressor, electrochemically compressing the excess hydrogen to compressed hydrogen, and recirculating the compressed hydrogen gas to the fuel cell.

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