SOFC Stacks Operating under Direct Internal Steam Reforming of Methane
| Autor: | F. Hauler, P. Freundt, Q. Fu, J. Bomhard |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Methane reformer
Renewable Energy Sustainability and the Environment Chemistry 020209 energy Energy Engineering and Power Technology 02 engineering and technology 021001 nanoscience & nanotechnology Electrochemistry Methane Anode Steam reforming chemistry.chemical_compound Chemical engineering Stack (abstract data type) 0202 electrical engineering electronic engineering information engineering Degradation (geology) 0210 nano-technology Electrical efficiency |
| Zdroj: | Fuel Cells. 17:151-156 |
| ISSN: | 1615-6846 |
| DOI: | 10.1002/fuce.201600078 |
| Popis: | Three SOFC test stacks were operated under conditions of direct internal steam reforming of methane at 750 °C. The influence of anode gas compositions (H2/N2, CH4/H2O, CH4/H2/H2O) on the stack degradation rate has been investigated through long-term durability testing. It has been found that complete internal steam reforming of methane leads to much faster degradation in comparison to partial pre-reforming. Possible reason for that is the depletion of Ni-catalyst due to the formation of volatile Ni(OH)2 at the fuel entrance. Though this effect was observed previously at 950 °C, the present results indicate that it might still play an important role at 750 °C. The lowest degradation was observed with Stack-3 (ca. 12 mV kh−1 per RU or 1.5% kh−1), which shows also a reasonably high electrical efficiency (>50%) under fuel utilisation of 70.2%. |
| Databáze: | OpenAIRE |
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