Development work for a compact hydrogen supply system with a thermal output of 65 kW applying ethanol as fuel was started by IMM in collaboration with Rosetti Marino, an Italian plant engineering company. The system concept is comprised of an ethanol steam reformer operated at 10 bar, water-gas shift for the reduction of carbon monoxide in the reformate, a pressure swing adsorption for separating the hydrogen out of the reformate, and numerous heat exchangers and coupled evaporators/catalytic burners as balance-of-plant: The work included all aspects of the fuel processor, namely, development of a Rh/Co catalyst for ethanol steam reforming, the verification of its long-term durability in a 1000 h test, static and dynamic simulation work applying ASPEN plus and ASPEN Dynamics,: setup of a control strategy, and finally the sizing and design of the reactors and the development of a full 3D-CAD model of the fuel processor.