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Method and apparatus for operating a fuel cell

  • US 6,461,751 B1
  • Filed: 12/06/1999
  • Issued: 10/08/2002
  • Est. Priority Date: 12/06/1999
  • Status: Expired due to Fees
First Claim
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1. A method of operating a fuel cell, wherein said fuel cell has a cathode supplied with an oxidant stream and an anode supplied with a fuel stream, said method comprising:

  • (a) monitoring a cathode exhaust stream downstream of said cathode to detect hydrogen gas concentration; and

    (b) decreasing oxidant stoichiometry when said hydrogen gas concentration is less than a first threshold concentration.

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