| 摘要 |
PROBLEM TO BE SOLVED: To stably conduct fuel reforming by making oxygen contained in a fuel nontoxic when a fuel cell power generating system is operated by using city gas containing a very small amount of oxygen in the fuel. SOLUTION: A fuel cell power generating system generates power in such a way that city gas containing oxygen is used as a fuel, the city gas is reformed through a hydrogenation type desulfurizing device 3, a steam reformer 2, a CO transformer 4, a hydrogen-rich reformed gas obtained is supplied to a fuel cell 1, and part of the reformed gas is recycled and added to a desulfurizing process. A flow rate control valve 9 serving as a gas flow rate control means, an oxygen meter 10, and an adjusting device 11 are arranged so that the amount of the reformed gas required to the, reaction with oxygen contained in the raw fuel is added to the amount of the reformed gas required to desulfurizing reaction, then supplied, and a very small amount of oxygen contained in the raw fuel is converted into water by reduction reaction with hydrogen in parallel to desulfurization of the raw fuel by hydrogenation to protect a reforming catalyst from poisoning. |
