Fuel cell CO sensor
- Rochester, NY
- Pittsford, NY
- East Rochester, NY
- Los Alamos, NM
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.
- Research Organization:
- General Motors LLC, Detroit, MI (United States)
- DOE Contract Number:
- AC02-90CH10435
- Assignee:
- General Motors Corporation (Detroit, MI)
- Patent Number(s):
- US 6001499
- Application Number:
- 08/957563
- OSTI ID:
- 872749
- Country of Publication:
- United States
- Language:
- English
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Method of monitoring CO concentrations in hydrogen feed to a PEM fuel cell
Method of monitoring CO concentrations in hydrogen feed to a PEM fuel cell
Related Subjects
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
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