PEMFC contaminant tolerance limit—CO in H2

✍ Scribed by Jean St-Pierre

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 240 KB
• Volume: 55
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/j.electacta.2010.02.061

✦ Synopsis

Equations are derived from a generic, transient PEMFC contamination model to predict the effect of CO contaminant concentration in H 2 on both steady state performance losses and time constants. The resulting predictions allowed determination of the CO tolerance limit for the cases of a Pt and WC catalyst under specific operating conditions. An increase of the International Organization for Standardization CO tolerance limit of 0.2 ppm is possible because the CO concentration leading to a steady state performance loss of less than 1% is estimated at 0.2-0.9 ppm. An increase in CO tolerance limit is expected to reduce the analytical verification cost (quality control). The steady state performance loss is independent of catalyst loading thus avoiding a future standard change resulting from PEMFC cost reduction activities.