Fuel cell CO sensor
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.
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-90CH10435
- OSTI ID:
- 20014002
- Resource Relation:
- Other Information: PBD: 14 Dec 1999
- 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