| Titre : | Pure hydrogen production from pyrolysis oil using the steam−iron process : Effects of temperature and iron oxide conversion in the reduction (2010) |
| Auteurs : | M. F. Bleeker, Auteur ; H. J. Veringa, Auteur ; S. R. A. Kersten, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 49 N° 1, Janvier 2010) |
| Article en page(s) : | pp. 53–64 |
| Note générale : | Indusrtial chemistry |
| Langues : | Anglais |
| Tags : | Pure Hydrogen Production from Pyrolysis Oil Using the Steam− ; Iron Process: Effects of Temperature and Iron Oxide Conversion in Reduction |
| Résumé : | In the steam−iron process, relatively pure hydrogen can be produced from pyrolysis oil in a redox cycle with iron oxides. Experiments in a fluidized bed showed that the hydrogen production from pyrolysis oil increases with increasing temperature during reduction. The experimental hydrogen production at nearly 1000 °C with noncatalytic (blast furnace) and catalytic (ammonia synthesis) iron oxide was found to be 1.39 and 1.82 Nm3 of H2/kg of dry oil, respectively. However, this high hydrogen production could be achieved only when a low relative conversion (α) of the iron oxide in the reduction was maintained (about 7%). It was found in all experiments that the reduction rate decreased strongly with increasing relative conversion of the iron oxide [at 800 °C, the relative conversion rate (dα/dt) decreased from 3.0 × 10−4 s−1 at α = 0.6% to 8.8 × 10−6 s−1 at α = 10.0%]. The gasification of pyrolysis oil over an iron oxide bed results in an increased carbon-to-gas conversion compared to gasification over a sand bed. Near-complete gasification of oil is achieved when temperatures above 900 °C are applied in a fluidized-bed setup containing iron oxide. A lumped reaction path scheme is proposed for char formation in pyrolysis oil gasification. |
| ISSN : | 0888-5885 |
| En ligne : | http://pubs.acs.org/doi/abs/10.1021/ie900530d |
