METHOD OF DESULFURIZATION, DEVICE OF DESULFURIZATION, DEVICE FOR PRODUCING FUEL GAS FOR FUEL CELL AND FUEL CELL SYSTEM

摘要

PPROBLEM TO BE SOLVED: To provide a fuel cell system equipped with a device of desulfurization making its catalyst have a long life, and easily reducing its size. PSOLUTION: By a controlling device, temperature is controlled in a temperature condition that the temperature of desulfurization becomes gradually higher as the treating period of desulfurization of the liquid fuel 111A with a nickel-based desulfurizer becomes longer. At a step that the activity of the nickel-based desulfurizer is high at the beginning of start of the desulfurization treatment, it is possible to prevent the reduction of activity by coke deposition at a relatively high temperature region and the reduction of treating efficiency by the gasification of the liquid fuel 111A by performing the desulfurization treatment at a relatively low temperature. Since the temperature is elevated gradually to improve reactivity when the activity of the nickel-based catalyst is decreased by extending the treatment time, it is possible to exhibit the performance of the nickel-based desulfurizer in a good efficiency and to extend the life of the nickel-based desulfurizer. It is not necessary to use more than enough nickel-based desulfurizer, and it is possible to rationalize the filled amount of the nickel-based desulfurizer, and also a gas-treating device by gasification is not required and the reduction of its size can be easily aimed at. PCOPYRIGHT: (C)2008,JPO&INPIT