Reformation of diesel fuel was performed using a silicon carbide (SiC) block with penetrating walls. The atomized fuel was spray injected to the electrically heated block. The fuel air mixture was reformed by partial oxidation and changed to synthesis gas including CO, CO2, H2O, O-2 and H-2. The composition of the reformed gas was measured with varying fuel air ratios. The degree of reformation or conversion changes with the temperature and a maximum conversion efficiency of similar to 90% is attained at around 850 degrees C. Copyright (C) 2009 John Wiley & Sons, Ltd.