J0802-3-1 バイオガス直接供給型燃料電池の開発([J0802-3]SOFC(2))

概要

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Direct feeding of biogas to SOFC has been tested in this research. Using anode-supported button cells, internal reforming SOFC has been operated at 800 ℃ with real biogas (direct-biogas SOFC). The addition of equimolar amount of air to the actual biogas reduced the risk of carbon deposition and enabled us to operate SOFC more stably. Electrochemical measurement with 5 x 5 cm^2 square-shaped cell revealed that cell deflection occurred at the gas inlet side when the simulated biogas (CH_4/CO_2 = 1.5) was directly supplied. This would be due to the locally-decreased cell temperature caused by internal dry reforming. Cell performance was confirmed to be stabilized by air addition to biogas, however in order to avoid carbon deposition at fuel inlet side the addition of equimolar amount of air is insufficient, Air/Biogas ratio higher than 1 is required for practical application.
2010-09-04