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Química Nova

Print version ISSN 0100-4042On-line version ISSN 1678-7064


LOPES, Thiago  and  GONZALEZ, Ernesto R.. Effect of sulfur and nitrogen dioxides on the performance of a proton exchange membrane fuel cell. Quím. Nova [online]. 2008, vol.31, n.3, pp.551-555. ISSN 0100-4042.

There is presently much interest in the clean and efficient generation of energy by proton exchange membrane fuel cells (PEMFC), using hydrogen as fuel. The generation of hydrogen by the reforming of other fuels, anaerobic fermentation of residual waters and other methods, often produce contaminants that affect the performance of the cell. In this work, the effect of gaseous SO2 and NO2 on the performance of a H2/O2 single PEMFC is studied. The results show that SO2 decreases irreversibly the performance of the cell under operating conditions, while NO2 has a milder effect that allows the recovery of the system.

Keywords : fuel cells; nitrogen dioxide; sulfur dioxide.

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