Abstract
In this work, thermodynamics was applied to investigate the glycerol autothermal reforming to generate hydrogen for fuel cell application. Equilibrium calculations employing the Gibbs free energy minimization were performed in a wide range of temperature (700–1000 K), steam to glycerol ratio (1–12) and oxygen to glycerol ratio (0.0–3.0). Results show that the most favorable conditions for hydrogen production are achieved with the temperatures, steam to glycerol ratios and oxygen to glycerol ratios of 900–1000 K, 9–12 and 0.0–0.4, respectively. Further, it is demonstrated that thermoneutral conditions (steam to glycerol ratio 9–12) can be obtained at oxygen to glycerol ratios of around 0.36 (at 900 K) and 0.38–0.39 (at 1000 K). Under these thermoneutral conditions, the maximum number of moles of hydrogen produced are 5.62 (900 K) and 5.43 (1000 K) with a steam to glycerol ratio of 12. Also, it should be noted that methane and carbon formation can be effectively eliminated.
Original language | English |
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Pages (from-to) | 5683-5690 |
Number of pages | 8 |
Journal | International Journal of Hydrogen Energy |
Volume | 34 |
Issue number | 14 |
Early online date | 21 Jun 2009 |
DOIs | |
Publication status | Published - Jul 2009 |
Keywords
- glycerol
- autothermal reforming
- hydrogen production
- thermodynamic analysis
- thermoneutral