1-1-1 石炭ガス化ガス中有害微量成分のSOFCセルへの影響(1-1 微量元素・燃焼,Session1 石炭・重質油等,研究発表)

概要

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The effect of the trace elements on metal corrosion in an electrode cell of solid oxide fuel cells (SOFC) was investigated by the thermodynamic equilibrium calculations under the condition of the simulated gasification gas and the exposure experiments with an electrical furnace. In addition, the in situ observation of the surface of a button cell in the exposure experiments was carried out by using the microscope with a hot-stage to kinetically follow the behavior of the precipitation of metals such as nickel on the surface of the cell. As a result, it was found that arsenic and selenium erode zirconia and react nickel to form NiAs and Ni_7Se_8 in the electric cell for the retention time of 6.5 h after heating to 700℃. On the other hand, it was found that nickel compounds precipitate from the cell and condense on the surface of the cell to pose pore blockage since then.
2011-08-09