Hydrogen production by steam reforming of |ethanol over flowerlike micro spheres NiO/CeO₂ catalyst

CeO₂ samples were prepared by the hydrothermal method. The NiO/CeO₂ catalyst was prepared by impregnation. The catalyst was characterized by means of X-ray diffraction(XRD),Scanning Electronic Microscope(SEM) combined by the X-ray energy spectrometer (XES) and BET area. The catalysis properties of the catalysts were tested using a fix bed micro-reactor fitted in a programmable oven. 1.0g catalyst was loaded and the inflow liquid was 0.05mL/min. Results showed that NiO/CeO₂ had high activity and stability on low temperature ethanol steam reforming reaction. And, trace amount of Cr, Zn, Cu were added to inhibit CO, CH₄ formation and to improve the yield of H₂ as well the resistance to carbon deposition greatly. Catalyst stability was achieved in more than 2000h reaction. Cycle test repeated 12 times and showed high stability and good catalytic activity.