H - Electricity – 01 – M
Patent
H - Electricity
01
M
H01M 8/04 (2006.01) H01M 8/06 (2006.01)
Patent
CA 2048666
2048666 9110266 PCTABS00006 A fuel cell (10) system in which a nitrogen (N2) gas is used on the anode section (11) and a nitrogen/oxygen (N2/O2) gaseous mix is used on the cathode section (12) to maintain the cathode at an acceptable voltage potential during adverse conditions occurring particularly during off-power conditions, for example, during power plant shutdown, start-up and hot holds. During power plant shutdown, the cathode section is purged with a gaseous mixture of, for example, one-half percent (0.5 %) oxygen (O2) and ninety-nine and a half percent (99.5 %) nitrogen (N2) supplied from an ejector (21) bleeding in air (24/28) into a high pressure stream (27) of nitrogen (N2) as the primary or majority gas. Thereafter the fuel gas in the fuel processor (31) and the anode section (11) is purged with nitrogen gas to prevent nickel (Ni) carbonyl from forming from the shift catalyst.
Bushnell Calvin L.
Davis Christopher L.
International Fuel Cells Corporation
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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