TY - JOUR
T1 - Hydrogen production by glycerol steam reforming with in situ hydrogen separation
T2 - A thermodynamic investigation
AU - Wang, Xiaodong
AU - Wang, Na
AU - Li, Maoshuai
AU - Li, Shuirong
AU - Wang, Shengping
AU - Ma, Xinbin
PY - 2010/10
Y1 - 2010/10
N2 - Thermodynamic features of hydrogen production by glycerol steam reforming with in situ hydrogen extraction have been studied with the method of Gibbs free energy minimization. The effects of pressure (1-5 atm), temperature (600-1000 K), water to glycerol ratio (WGR, 3-12) and fraction of H2 removal (f, 0-1) on the reforming reactions and carbon formation were investigated. The results suggest separation of hydrogen in situ can substantially enhance hydrogen production from glycerol steam reforming, as 7 mol (stoichiometric value) of hydrogen can be obtained even at 600 K due to the hydrogen extraction. It is demonstrated that atmospheric pressure and a WGR of 9 are suitable for hydrogen production and the optimum temperature for glycerol steam reforming with in situ hydrogen removal is between 825 and 875 K, 100 K lower than that achieved typically without hydrogen separation. Furthermore, the detrimental influence of increasing pressure in terms of hydrogen production becomes marginal above 800 K with a high fraction of H2 removal (i.e., f = 0.99). High temperature and WGR are favorable to inhibit carbon production. © 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
AB - Thermodynamic features of hydrogen production by glycerol steam reforming with in situ hydrogen extraction have been studied with the method of Gibbs free energy minimization. The effects of pressure (1-5 atm), temperature (600-1000 K), water to glycerol ratio (WGR, 3-12) and fraction of H2 removal (f, 0-1) on the reforming reactions and carbon formation were investigated. The results suggest separation of hydrogen in situ can substantially enhance hydrogen production from glycerol steam reforming, as 7 mol (stoichiometric value) of hydrogen can be obtained even at 600 K due to the hydrogen extraction. It is demonstrated that atmospheric pressure and a WGR of 9 are suitable for hydrogen production and the optimum temperature for glycerol steam reforming with in situ hydrogen removal is between 825 and 875 K, 100 K lower than that achieved typically without hydrogen separation. Furthermore, the detrimental influence of increasing pressure in terms of hydrogen production becomes marginal above 800 K with a high fraction of H2 removal (i.e., f = 0.99). High temperature and WGR are favorable to inhibit carbon production. © 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
KW - Glycerol steam reforming
KW - Hydrogen
KW - Hydrogen separation
KW - Thermodynamic analysis
U2 - 10.1016/j.ijhydene.2010.07.140
DO - 10.1016/j.ijhydene.2010.07.140
M3 - Article
SN - 0360-3199
VL - 35
SP - 10252
EP - 10256
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 19
ER -
