Hydrogen production by glycerol steam reforming with in situ hydrogen separation: a thermodynamic investigation

Xiaodong Wang, Na Wang, Maoshuai Li, Shuirong Li, Shengping Wang, Xinbin Ma

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37 Citations (Scopus)

Abstract

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.
Original languageEnglish
Pages (from-to)10252-10256
Number of pages5
JournalInternational Journal of Hydrogen Energy
Volume35
Issue number19
Early online date23 Aug 2010
DOIs
Publication statusPublished - Oct 2010

Keywords

  • hydrogen
  • glycerol steam reforming
  • hydrogen separation
  • thermodynamic analysis

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