Journal
RENEWABLE ENERGY
Volume 36, Issue 11, Pages 3195-3202Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2011.03.013
Keywords
Glycerol; Hydrogen; Steam reforming; Ceria; Thermodynamics; Kinetics
Funding
- Centre for Fire, Explosive and Environment Safety (CFEES-DRDO)
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The study focuses on hydrogen production from steam reforming of glycerol over nickel based catalyst promoted by zirconia and supported over ceria. Catalyst was prepared by the wet-impregnation method and characterized by BET surface area analysis, X-ray diffraction technique and scanning electron microscopy (SEM) analysis. The performance of the catalyst was evaluated in terms of hydrogen yield, selectivity and glycerol conversion at 700 degrees C in a tubular fixed bed reactor. The effect of glycerol concentration in feed, space time (W/F-AO,), temperature and time on stream (TOS) was analyzed for the catalyst Ni-ZrO2/CeO2 which showed the complete conversion of glycerol and high H-2 yield that corresponds to 3.95 mol of H-2 out of 7 mol. Thermodynamic analysis was also carried out using Aspen HYSYS for system having glycerol concentration 10 wt% and 20 wt% and experimental results were compared with thermodynamics. Kinetic study was carried out for the steam reforming of glycerol over Ni-ZrO2/CeO2 catalyst using the power law model. The values of activation energy and order of reaction were found to be 43.4 kJ/mol and 0.3 respectively. (c) 2011 Elsevier Ltd. All rights reserved.
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