| 摘要 |
PURPOSE:To be able to operate under the small quantity of steam by arranging plural kinds of fuel reforming catalysts in the fuel flowing direction, and arranging fuel reforming catalysts on which carbon deposition rate is lower compared with those in the downstream side on the upstream side. CONSTITUTION:Upstream fuel reforming catalysts 8a are arranged on the upstream side of a fuel passage 7, and downstream fuel reforming catalysts 8b on its downstream side. The catalysts 8a have lower carbon deposition rate than the catalysts 8b. Raw fuel supplied to the passage 7 reacts with steam simultaneously supplied there to produce hydrogen, carbon monoxide, and carbon dioxide. Even when the supply of steam is insufficient, carbon deposition in reforming reaction is retarded by the catalysts 8a arranged on the upstream side. Since the steam produced in the cell reaction can be utilized on the downstream side of the passage 7, the quantity of steam is made sufficient, and reforming reaction is conducted with usual catalysts 8b. As a whole, a fuel cell can be operated under the small quantity of steam, and cell performance is increased. |
