| 摘要 |
<p>A fuel for use in a fuel cell system comprising a mixture of hydrocarbon compounds which is a gas at ordinary temperatures and contains saturated components in an amount of 60 mole % or more, olefin components in an amount of 40 mole % or less and butadiene components in an amount of 0.5 mole % or less, wherein saturated components having 4 or more carbon atoms contain iso-paraffins in an amount of 0.1 mole % or more. 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.</p> |
