Hydrogen production by steam reforming of dimethyl ether over Cu-Zn/CeO2-ZrO2 catalytic monoliths

摘要

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.