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The Effect of addition of ZrO2 to Fe2O3 for hydrogen production by chemical looping / Wen Liu in Industrial & engineering chemistry research, Vol. 51 N° 51 (Décembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 51 (Décembre 2012) . - pp. 16597–16609 Titre : The Effect of addition of ZrO2 to Fe2O3 for hydrogen production by chemical looping Type de document : texte imprimé Auteurs : Wen Liu, Auteur ; John S. Dennis, Auteur ; Stuart A. Scott, Auteur Année de publication : 2012 Article en page(s) : pp. 16597–16609 Note générale : Industrial chemistry Langues : Anglais (eng) Résumé : In this paper, a synthetic mixture of ZrO2 and Fe2O3 was prepared by coprecipitation for use in chemical looping and hydrogen production. Cycling experiments in a fluidized bed showed that a material composed of 30 mol % ZrO2 and 70 mol % Fe2O3 was capable of producing hydrogen with a consistent yield of 90 mol % of the stoichiometric amount over 20 cycles of reduction and oxidation at 1123 K. Here, the iron oxide was subjected to cycles consisting of nearly 100% reduction to Fe followed by reoxidation (with steam or CO2 and then air) to Fe2O3. There was no contamination by CO of the hydrogen produced, at a lower detection limit of 500 ppm, when the conversion of Fe3O4 to Fe was kept below 90 mol %. A preliminary investigation of the reaction kinetics confirmed that the ZrO2 support does not inhibit rates of reaction compared with those observed with iron oxide alone. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie302626x [article] The Effect of addition of ZrO2 to Fe2O3 for hydrogen production by chemical looping [texte imprimé] / Wen Liu, Auteur ; John S. Dennis, Auteur ; Stuart A. Scott, Auteur . - 2012 . - pp. 16597–16609. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 51 (Décembre 2012) . - pp. 16597–16609 Résumé : In this paper, a synthetic mixture of ZrO2 and Fe2O3 was prepared by coprecipitation for use in chemical looping and hydrogen production. Cycling experiments in a fluidized bed showed that a material composed of 30 mol % ZrO2 and 70 mol % Fe2O3 was capable of producing hydrogen with a consistent yield of 90 mol % of the stoichiometric amount over 20 cycles of reduction and oxidation at 1123 K. Here, the iron oxide was subjected to cycles consisting of nearly 100% reduction to Fe followed by reoxidation (with steam or CO2 and then air) to Fe2O3. There was no contamination by CO of the hydrogen produced, at a lower detection limit of 500 ppm, when the conversion of Fe3O4 to Fe was kept below 90 mol %. A preliminary investigation of the reaction kinetics confirmed that the ZrO2 support does not inhibit rates of reaction compared with those observed with iron oxide alone. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie302626x