Experimental investigation of carbon monoxide poisoning effect on a PBI/H3PO4 high temperature polymer electrolyte membrane fuel cell: Influence of anode humidification and carbon dioxide
By Fan Zhou and S
Published in International Journal of Hydrogen Energy
NULL
2015
Abstract
The PBI/H3PO4 high temperature (HT) \PEM\ fuel cell is often fueled with H2-rich reformates which typically contain impurities such as CO, \CO2\ and water vapor. \CO\ in the concentration level of several percent can cause apparent loss in performance of the HT-PEM fuel cell. In this study the influences of \CO2\ and water content in anode stream on \CO\ poisoning of a HT-PEM fuel cell were investigated. Polarization curves and electrochemical impedance spectra were measured to quantify the performance loss caused by \CO\ poisoning under different conditions. The experimental results suggest that higher anode humidity level reduced the cell performance loss caused by \CO\ poisoning. When the fuel cell was operated with pure H2, the cell performance was not significantly affect by the change in anode dew point temperature in the range of room temperature and 60
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