Start up of proton exchange membrane fuel cell

Details Start up of proton exchange membrane fuel cell Start up of proton exchange membrane fuel cell

1998-10-09

2000-10-03

Kalafut, Stephen

Chemistry: electrical current producing apparatus, product, and

Having magnetic field feature

429 26, H01M 804

Patent

active

061270563

ABSTRACT:
A proton exchange membrane fuel cell has a noble metal or noble metal alloy catalyst 15 disposed in its air inlet manifold 13. During start up, a fuel cell is warmed to operating temperature by introducing a small amount of hydrogen into a flow of air to the air inlet 12 of the fuel cell where they react with the catalyst to produce heat at subflame temperatures. The adiabatic temperature rise of the gas stream is limited to about 150.degree. F. by limiting the hydrogen to about one volume percent of the fuel/oxidant mixture, thereby to be capable of raising the fuel cell temperature, for instance, from -40.degree. C. (-40.degree. F.) to about +45.degree. C. (+113.degree. F.), without flame, explosion or drying out of the membrane.

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patent: 5712052 (1998-01-01), Kawatsu
patent: 5753383 (1998-05-01), Cargnelli et al.
patent: 5998053 (1999-12-01), Dietheum

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