Hydrogen Production From Glycerol On NiCeLaO Catalysts Via Steam Reforming Reaction

The energy crisis could be eased by large-scale production of biodiesel to some extent.The output of glycerol by-product in industrial production of biodiesel is very tremendous.Researchers’ attention has been widely attracted in how to make full use of glycerol.Hydrogen from glycerol reforming is a very clean and environmental friendly energy.Therefore, it is an ideal way to generate hydrogen from glycerol by reforming.In this work, different catalysts which contain different Ce and La molar content wereprepared by co-precipitation withtriethylamine as the precipitating agent. The catalysts weredenoted as Ce0.5Ni0.5Ox, Ce0.4Ni0.5La0.1Ox, Ce0.3Ni0.5La0.2Ox, Ce0.2Ni0.5La0.3Ox,Ce0.1Ni0.5La0.4Ox, Ni0.5La0.5Ox respectively according to their different content of Ceand La. We could verify that Ce0.4Ni0.5La0.1Ox owns better activity than Ce0.5Ni0.5Ox interms of hydrogen storage by means of in situ DRIFT-IR. Samples were characterized byXRD, TPR, FT-IR, XPS and TEM etc to explore the morphology, structure and valence stateof catalysts.The Ce0.4Ni0.5La0.1Ox catalyst showed the best catalytic performances in steamreforming of glycerol (SRG).100%glycerol conversion, with gaseous composition up to50%H2was obtained at S/C ratio of2,650℃and GHSV of120000h-1. Besides, there was nocarbon precursor such as ethylene formed. The glycerol conversion reduced to85%in31hstability tests which might due to the carbon formation during reforming reaction. TheCe0.4Ni0.5La0.1Ox catalyst also showed superior performances in oxidative reforming ofglycerol(OSRG). It was stable during100h time on stream. According to the characterizationresults we could rationale the superior performances of Ce0.4Ni0.5La0.1Ox to the reasons asfollows: the strong interaction between Ni particles and supports(SIMS), highest specificsurface area and pore volume, and optimum lattice oxygen content. The results presented heredemonstrated that the catalysts’ performance in hydrogen production from glycerol reformingcan be improved by doping proper content of La into CeO2lattice.