Pure hydrogen production from pyrolysis oil using the steam−iron process / M. F. Bleeker in Industrial & engineering chemistry research, Vol. 49 N° 1 (Janvier 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 1 (Janvier 2010) . - pp. 53–64 Titre : Pure hydrogen production from pyrolysis oil using the steam−iron process : Effects of temperature and iron oxide conversion in the reduction Type de document : texte imprimé Auteurs : M. F. Bleeker, Auteur ; H. J. Veringa, Auteur ; S. R. A. Kersten, Auteur Année de publication : 2010 Article en page(s) : pp. 53–64 Note générale : Indusrtial chemistry Langues : Anglais (eng) Mots-clés : 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 [article] Pure hydrogen production from pyrolysis oil using the steam−iron process : Effects of temperature and iron oxide conversion in the reduction [texte imprimé] / M. F. Bleeker, Auteur ; H. J. Veringa, Auteur ; S. R. A. Kersten, Auteur . - 2010 . - pp. 53–64. Indusrtial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 1 (Janvier 2010) . - pp. 53–64 Mots-clés : 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

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