Hydrogen production by catalytic steam reforming of glycerol in a fixed bed
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A series of Ni-based catalysts were prepared by co-precipitation method with dolomite(DM) as support. The catalytic steam reforming of glycerol which was selected as a model compound of bio-oil from biomass pyrolysis was studied over the Ni-based catalysts in a fixed bed reactor. The catalysts were characterized by means of XRD and SEM, and the carbon deposition was analyzed by means of TG. The results showed that the addition of MgO and/or MoO3 to the Ni-dolomite catalysts could improve the catalyst activity greatly and reduce the rate of the carbon deposition effectively. The influences of temperature, ratio of steam to carbon (n(H2O):n(C)) and feeding space velocity on the catalytic steam reforming were investigated. Under the optimum conditions of Ni/Mo-MgO-DM as the catalyst, reaction temperature 650-700°C, n(H2O):n(C) 8-10 and feeding space velocity 2.4-3.6 h-1, the H2 content in the products could reach more than 74%(x).
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