Patent ID: 6824573
Filing Date: 2004-11-30
Classification: C01B,C10L,H01M,Y02E

Abstract:
A fuel for a fuel cell system comprising 0.5-40 mass % of oxygenates in terms of an oxygen content based on the whole fuel, wherein the fuel contains 5 vol. % or more of hydrocarbons based on the whole fuel, a content of hydrocarbon compounds having 4 carbon atoms is 15 vol. % or less, a content of hydrocarbon compounds having 5 carbon atoms is 5 vol. % or more and a content of hydrocarbon compounds having 6 carbon atoms is 10 vol. % or more based on the whole hydrocarbons, a sulfur content is 1 ppm by mass or less based on the whole fuel, saturates are 30 vol. % or more based on the whole hydrocarbons, a ratio of branched paraffins in paraffins is 30 vol. % or more, heat capacity of the fuel is 2.6 kJ/kg Â° C. or less at 15Â° C. and 1 atm in liquid phase, heat of vaporization of the fuel is 400 kJ/kg or less, said fuel has distillation properties of an initial boiling point in distillation of 24Â° C. or higher and 40Â° C. or lower, a 10 vol. % distillation temperature (T10) of 25Â° C. or higher and 50Â° C. or lower, a 90 vol. % distillation temperature (T90) of 45Â° C. or higher and 100Â° C. or lower, and a final boiling point in distillation of 55Â° C. or higher and 130Â° C. or lower.