The influence of CO2, CO and air bleed on the current distribution of a polymer electrolyte fuel cell |
| |
| Authors: | Thomas Tingelöf Lars Hedström Nicklas Holmström Per Alvfors Göran Lindbergh |
| |
| Affiliation: | 1. Department of Chemical Engineering and Technology, Applied Electrochemistry, Royal Institute of Technology, KTH, Teknikringen 42, SE-100 44 Stockholm, Sweden;2. Department of Chemical Engineering and Technology, Energy Processes, Royal Institute of Technology, KTH, Teknikringen 50, SE-100 44 Stockholm, Sweden |
| |
| Abstract: | The influence of CO2, CO and air bleed on current distribution was studied during transient operation, and the dynamic response of the fuel cell was evaluated. CO causes significant changes in the current distribution in a polymer electrolyte fuel cell. The current distribution reaches steady state after approximately 60 min following addition of 10 ppm CO to the anode fuel stream. Air bleed may recover the uneven current distribution caused by CO and also the drop in cell voltage due to CO and CO2 poisoning. The recovery of cell performance during air bleed occurs evenly over the electrode surface even when the O2 partial pressure is far too low to fully recover the CO poisoning. The O2 supplied to the anode reacts on the anode catalyst and no O2 was measured at the cell outlet for air bleed levels up to 2.5%. |
| |
| Keywords: | PEFC Current distribution Reformate Carbon dioxide Air bleed |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
