| 摘要 |
PURPOSE:To aim at obtaining electric output stable over a long term, by making electrochemical characteristics of unit fuel cells at the entrance part of gas flow smaller than those at other parts, when laminating plural number of unit fuel cells in which reforming catalysts are arranged in a gas passage on the fuel gas side adjacent to an electrode on the same fuel gas side. CONSTITUTION:At the fuel gas entrance part of a fuel gas side perforated plate 14 with a number of openings 14a, opening ratio is made smaller, while gas diffusion resistance being made bigger, than those at other parts, in order to make electrochemical characteristics of fuel cells at the entrance part smaller than those at other parts. Thus, in the fuel gas, consisting mainly of hydrocarbon or alcohol group and steam, to be supplied to laminate of internally reformed, molten carbonates type fuel cells, reaction consuming hydrogen takes place in parallel with gas decomposition etc at the gas side passage 8 adjacent to the gas side electrode 2 keeping current density of cells at the entrance part as small as it used to be, even when a large amount of electric current is taken out. Accordingly, the activity of reforming catalysts 10 is made stable and even a small amount of filling load comes to do well. |
