H2 production from stable ethanol steam reforming over catalyst of NiO based on flowerlike CeO2 microspheres

Catalyst of nickle oxide based on flowerlike cerium microspheres with high dispersion was made to achieve simultaneous dehydrogenation of ethanol and water molecules on multi-active sites. XRD, 77 K N-2 adsorption and FESEM were applied to analyse and observe the catalyst's structure, porosity and morphology. This special morphology catalyst represented novel stability more than 600 h for hydrogen production at low temperature ethanol steam reforming. Ethanol-water mixtures could be converted into H-2 with average selectivity value of 61.5 mol.% and average ethanol conversion 95.0 mol.% at 350 degrees C, with GHSV similar to 1.0 x 10(5) h(-1), low CO selectivity about average value of 2.1 mol.%, during 550 h reforming stability test. Catalytic parameters with respect to yield of H-2, activity, selectivity towards hydrogen production and stability with time on stream were determined. (C) 2009 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.