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HWAHAK KONGHAK,
Vol.33, No.6, 780-786, 1995
Vol.33, No.6, 780-786, 1995
용융탄산염연료전지의 anode 반응에서 물질전달의 영향
Mass Transfer Effects effects on the Anode Reaction in MCFC
용융탄산염연료전지에서 anode의 수소산화 반응에서 미치는 물질전달의 영향을 규명하기 위해, 정상상태 분극실험으로 반응물과 생성물의 확산영향을 보았고, Ni 및 Ni-Al anode의 금속투과 수소확산계수를 정전류기법(galvanostatic method)으로, 그리고 이들의 교환전류밀도를 전이상태 분극실험으로 구하였다. 생성물과 반응물의 확산이 anode의 반응속도에 비슷한 정도로 영향을 주었으며, 알루미늄이 니켈에 첨가됨으로 인해 금속투과 수소의 확산계수와 교환전류밀도가 감소됨을 확인하였고 그리고 수소 확산속도 감소에 따라 교환전류밀도도 감소됨을 알 수 있었다.
The effect of mass transfer on the hydrogen oxidation reaction at molten carbonate fuel cell(MCFC) anode were studied. The effects of reactant diffusion and of products diffusion on the rate of the anode reaction were studied with steady-state polarization experiment. The exchange current densities of Ni-anode, Ni-Al anode were obtained by a transient method and diffusivities of hydrogen through these anodes were measured by galvanostatic method in MCFC anode half cell. The effect of products diffusion on the rate of anode reaction was same that of reactant diffusion. It was found that the diffusivities of hydrogen and the exchange current densities of the anodes were decreased by adding aluminum into the nickel anode. It was seemed that decrease of exchange current density resulted from decrease of hydrogen diffusivity through the anode.
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