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This paper deals with general aspects and experimental results of autothermal reforming of Jet A-1 and Diesel fuel. With that respect, at first a process analysis based on the so called pinch-point methodology compares three different reforming routes, i.e. steam reforming, partial oxidation and autothermal reforming. The analysis is based on the application of a high temperature polymer electrolyte fuel cell (HT-PEFC). Then, specifications of different possible fuels for reforming are given. Their constraints with respect to their suitability for autothermal reforming are discussed. Finally, experiments with respect to the long-term stability of two reforming reactors revealed that it is decisive to posses a highly sophisticated educt and fuel evaporation technology in combination with a homogeneous mixing of the educts. Thereby, very promising long-term stabilities for autothermal reforming of Jet A-1 and Diesel fuel were achieved. E.g., there was 99 % conversion of Jet A-1 at the end of the long-term experiment after 2,000 h on stream.

Different novel technologies have been screened for liquid phase desulfurization, i.e. an extraction with ionic liquids, a fractional distillation, a membrane separation, a selective adsorption and a novel hydro-desulfurization technology (HDS). From lab-scale studies two desulfurization concepts were developed, i.e. a concept for an improved HDS technology and a two-stage concept. Before HDS the liquid fuel is externally saturated with syngas. Related to commercial HDS no gas recycle is necessary. For the second concept a light cut fraction is separated by distillation, while the heavy fraction is led back to the aircraft's tank. The subsequent deep desulfurization is realized by adsorption.