Several catalytic monoliths containing Cu, Zn, or Cu-Zn supported on CeO2, ZrO2, or CeO2-ZrO2 were prepared and tested for the dimethyl ether steam reforming reaction under a steam to carbon ratio of S/C=1.5 at 473-823 K. The best catalytic performance in terms of stability, hydrogen yield, and low CO production was obtained over Cu-Zn/ZrO2 catalytic monoliths (2.1 x 10(-3) mol(DME) h(-1) g(cat-1) converted with S-H2 = 96% and S-CO2 = 90% at 753 K). Catalytic monoliths were characterized by XRD, SEM, EDX, NH3-TPD as well as by long-term catalytic and mechanical stability tests. (C) 2009 Elsevier B.V. All rights reserved.