Patent ID: 6958117

Claim:
A fuel for a fuel cell system comprising hydrocarbon compounds, which fuel has distillation properties of the initial boiling point in distillation of 24° C. or higher and 40° C. or lower, the 10 vol. % distillation temperature of 25° C. or higher and 50° C. or lower, the 90 vol. % distillation temperature of 45° C. or higher and 130° C or lower, and the final boiling point in distillation of 55° C. or higher and 150° C. or lower, the fuel comprises 15 vol. % or less of hydrocarbon compounds having a carbon number of 4, 5 vol. % or more of hydrocarbon compounds having a carbon number of 5, 10 vol. % or more of hydrocarbon compounds having a carbon number of 6, a sulfur content is 1 ppm by mass or less, saturates are 30 vol. % or more, olefins are 35 vol. % or less, aromatics are 50 vol. % or less, a ratio of paraffins in saturates is 60 vol. % or more, and a ratio of branched paraffins in paraffins is 30 vol. % or more.