Glycerol Steam Reforming for Hydrogen Production over Nickel Supported on Alumina, Zirconia and Silica Catalysts

摘要: The aim of the work was to investigate influence support on catalytic performance Ni catalysts for glycerol steam reforming reaction. Nickel (8 wt%) supported Al2O3, ZrO2, SiO2 were prepared by wet impregnation technique. catalysts’ surface and bulk properties, at their calcined, reduced used forms, determined ICP, BET, XRD, NH3-TPD, CO2-TPD, TPR, XPS, TEM, TPO, Raman, SEM techniques. Ni/Si sample, even if it less active T <600 °C, produces more gaseous products reveals higher H2 yield whole temperature range. Ni/Zr facilitate WGS reaction, producing a gas mixture with high H2/CO molar ratio. after stability tests exhibits highest values total (70%) (45%) conversion, YH2 (2.5), SH2 (80%), SCO2 (65%), ratio (6.0) lowest SCO (31%), SCH4 (3.1%), CO/CO2 (0.48) among all samples. contribution graphitized carbon formed follows trend (I D /I G = 1.34) < 1.08) Ni/Al 0.88) indicates that fraction different types depends catalyst’s nature. It is suggested type rather important than amount deposited in determining stability. confirmed nature affects mainly phase Ni/SiO2 can be considered as promising catalyst