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Title: Fuel cell CO sensor

Abstract

The CO concentration in the H.sub.2 feed stream to a PEM fuel cell stack is monitored by measuring current and/or voltage behavior patterns from a PEM-probe communicating with the reformate feed stream. Pattern recognition software may be used to compare the current and voltage patterns from the PEM-probe to current and voltage telltale outputs determined from a reference cell similar to the PEM-probe and operated under controlled conditions over a wide range of CO concentrations in the H.sub.2 fuel stream. A CO sensor includes the PEM-probe, an electrical discharge circuit for discharging the PEM-probe to monitor the CO concentration, and an electrical purging circuit to intermittently raise the anode potential of the PEM-probe's anode to at least about 0.8 V (RHE) to electrochemically oxidize any CO adsorbed on the probe's anode catalyst.

Inventors:
 [1];  [2];  [2];  [1];  [3];  [4]
  1. (Rochester, NY)
  2. (Pittsford, NY)
  3. (East Rochester, NY)
  4. (Los Alamos, NM)
Issue Date:
Research Org.:
GENERAL MOTORS CORP
OSTI Identifier:
872749
Patent Number(s):
6001499
Application Number:
08/957563
Assignee:
General Motors Corporation (Detroit, MI) OSTI
DOE Contract Number:  
AC02-90CH10435
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
fuel; cell; sensor; concentration; feed; stream; pem; stack; monitored; measuring; current; voltage; behavior; patterns; pem-probe; communicating; reformate; pattern; recognition; software; compare; telltale; outputs; determined; reference; similar; operated; controlled; conditions; wide; range; concentrations; electrical; discharge; circuit; discharging; monitor; purging; intermittently; raise; anode; potential; rhe; electrochemically; oxidize; adsorbed; probe; catalyst; reference cell; fuel cell; electrical discharge; pattern recognition; fuel stream; cell stack; feed stream; wide range; pem fuel; controlled conditions; recognition software; measuring current; voltage patterns; voltage behavior; behavior patterns; cell similar; anode catalyst; reformate feed; pem-probe communicating; charge circuit; /429/48/

Citation Formats

Grot, Stephen Andreas, Meltser, Mark Alexander, Gutowski, Stanley, Neutzler, Jay Kevin, Borup, Rodney Lynn, and Weisbrod, Kirk. Fuel cell CO sensor. United States: N. p., 1999. Web.
Grot, Stephen Andreas, Meltser, Mark Alexander, Gutowski, Stanley, Neutzler, Jay Kevin, Borup, Rodney Lynn, & Weisbrod, Kirk. Fuel cell CO sensor. United States.
Grot, Stephen Andreas, Meltser, Mark Alexander, Gutowski, Stanley, Neutzler, Jay Kevin, Borup, Rodney Lynn, and Weisbrod, Kirk. Tue . "Fuel cell CO sensor". United States. https://www.osti.gov/servlets/purl/872749.
@article{osti_872749,
title = {Fuel cell CO sensor},
author = {Grot, Stephen Andreas and Meltser, Mark Alexander and Gutowski, Stanley and Neutzler, Jay Kevin and Borup, Rodney Lynn and Weisbrod, Kirk},
abstractNote = {The CO concentration in the H.sub.2 feed stream to a PEM fuel cell stack is monitored by measuring current and/or voltage behavior patterns from a PEM-probe communicating with the reformate feed stream. Pattern recognition software may be used to compare the current and voltage patterns from the PEM-probe to current and voltage telltale outputs determined from a reference cell similar to the PEM-probe and operated under controlled conditions over a wide range of CO concentrations in the H.sub.2 fuel stream. A CO sensor includes the PEM-probe, an electrical discharge circuit for discharging the PEM-probe to monitor the CO concentration, and an electrical purging circuit to intermittently raise the anode potential of the PEM-probe's anode to at least about 0.8 V (RHE) to electrochemically oxidize any CO adsorbed on the probe's anode catalyst.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {12}
}

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