Characteristic studies of a PBI/H3PO4 high temperature membrane PEMFC under simulated reformate gases
| Autor: | Wei Hsiang Lai, Siou Sheng Su, Yi Kuang Chen, Chen Yu Chen |
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| Rok vydání: | 2014 |
| Předmět: |
Hydrogen
Renewable Energy Sustainability and the Environment Chemistry Analytical chemistry Energy Engineering and Power Technology Proton exchange membrane fuel cell chemistry.chemical_element Condensed Matter Physics Catalysis Dielectric spectroscopy Dilution Fuel Technology Membrane Chemical engineering Catalytic reforming Operating temperature |
| Zdroj: | International Journal of Hydrogen Energy. 39:13757-13762 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2014.02.090 |
| Popis: | A high temperature proton exchange membrane fuel cell is considered a solution to improve the cell performance under CO-contained hydrogen and to simplify the gas purification process of a reformate fuel cell system. In this study, polybenzimidazole-based phosphoric acid-doped fuel cells are studied under simulated reformate gases of different H 2 , N 2 and CO concentrations. The experimental results show that the dilution effect of N 2 has a minor impact on the cell performance in absence of CO. However, the CO poisoning increases the charge transfer resistance and leads to a substantial performance drop. This work also reveals that increasing the operating temperature can effectively improve the CO tolerance by suppressing the Pt–CO binding reaction. In addition, the CO poisoning effect becomes more significant in diluted H 2 . As a result, the CO concentration should be maintained lower than a critical level to prevent a high CO coverage on the catalyst which leads to a noteworthy voltage shut-down, especially in highly diluted H 2 . |
| Databáze: | OpenAIRE |
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