Influence of Preparation Conditions on the Performance of Ni-Based Catalysts for Glycerol Steam Reforming

The effect of preparation conditions on the performance of Ni-based catalysts was investigated for glycerol steam reforming. La 0.7 Ce 0.3 NiO 3 mixed oxides were synthesized using different solution concentrations and calcination temperatures by a co-precipitation method. Brunauer-Emmett-Teller, inductively coupled plasma, X-ray diffraction, temperature-programmed reduction, field emission scanning electron microscopy, CO 2 -temperature-programmed desorption, thermal gravity analysis, and Raman spectroscopy were performed to characterize the catalysts. With an La 2 NiO 4 phase at lowest solution concentration, a catalyst precursor included an LaNiO 3 phase instead of La 2 NiO 4 at other solution concentrations. At a low calcination temperature of 700 °C, it was found that the smaller particle size of CeO 2 incorporated more lanthanum and higher surface basicity, and the La 2 O 2 CO 3 phase could effectively inhibit and eliminate coking leading to the better performance of catalysts.