Phosphoric acid fuel cell passivation with natural gas
US5419978A · kind A · utility
14Cited by
3References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 17, 1994 |
| Grant date | May 30, 1995 |
| Priority date | — |
| Expiry date | Mar 17, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The anodes of fuel cells in a fuel cell stack are passivated during no load, hot-hold periods by directing a stream of desulfurized natural gas through the anode side of the cells in the stack. The cell voltage is thus maintained below 800 millivolts, preferably between 300 and 500 millivolts, during such periods.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.