| abstract |
A fuel for use in a fuel cell system, which comprises oxygen-containing compounds in an amount of 0.5 to 40 mass % in terms of an oxygen atom relative to the total amount of the fuel. The fuel exhibits an increased energy output generated per its weight and per amount of CO2 formed, an improved fuel consumption, a decreased evaporative emission, good handling properties such as good storage stability and a suitable flash point, and reduced calories required for preheating. Further, the fuel allows a fuel cell system using the fuel to keep its initial performance for a long period of time, since it reduces the deterioration of a fuel cell system, that is, a reforming catalyst, a water gas shift reaction catalyst, a carbon monoxide removal catalyst, a fuel cell stack and the like. |