Hydrocarbon fuel processor and fuel useable therein

A process for autothermal reforming of a hydrocarbon fuel to produce hydrogen for use in a fuel cell, comprising:

• passing a hydrocarbon fuel having a total sulfur content of less than 30 ppm by weight, a (R+M)/2 octane rating of at least 60, and a aromatics+naphthenes content of less than 70 volume % over a catalyst comprising a Group VIII metal on a solid support, at reforming conditions with an oxygen (as O) to carbon ratio of greater than 0.7, to produce an effluent comprising hydrogen;
• and
• using at least a portion of the effluent comprising hydrogen in a fuel cell to produce electricity.