Natural and synthetic iron oxides for hydrogen storage and purification

J. Requies; M. B. Güemez; S. Perez Gil; V. L. Barrio; J. F. Cambra; U. Izquierdo; P. L. Arias

doi:10.1007/s10853-013-7377-7

Natural and synthetic iron oxides for hydrogen storage and purification

J. Requies^*, M. B. Güemez, S. Perez Gil, V. L. Barrio, J. F. Cambra, U. Izquierdo, P. L. Arias

^*Corresponding author for this work

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Abstract

In this paper, the hydrogen storage capacity of some synthetic and natural iron oxides is presented. The results of the activity tests and characterization techniques of natural and synthetic iron oxides (N₂ adsorption-desorption isotherms, temperature-programmed reduction, X-ray diffraction, and plasma atomic emission spectroscopy) suggest that the use of chromium on iron oxide systems improved their hydrogen storage capacity. This is related to the capacity of chromium to modify the iron oxide reduction profile when Cr was incorporated. A direct reduction from Fe₃O₄ to Fe was observed as the mechanism for H₂ storage. In addition, natural oxides as commercial Superfine and Densinox-L oxides are proved to be suitable materials to store and purify H₂ due to their high stability during different cycles of reduction and oxidation. The best results among the natural ones were Densinox-L and among the synthetic ones Fe-10Cr.

Original language	English
Pages (from-to)	4813-4822
Number of pages	10
Journal	Journal of Materials Science
Volume	48
Issue number	14
DOIs	https://doi.org/10.1007/s10853-013-7377-7
Publication status	Published - Jul 2013

Funding

Acknowledgements The authors wish to acknowledge the financial support of the Universidad del País Vasco and Basque Regional Government for this work (Saiotek program) and to Tecnalia for its kind collaboration to carry out this work.

Funders	Funder number
Universidad del País Vasco and Basque Regional Government

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abstract = "In this paper, the hydrogen storage capacity of some synthetic and natural iron oxides is presented. The results of the activity tests and characterization techniques of natural and synthetic iron oxides (N2 adsorption-desorption isotherms, temperature-programmed reduction, X-ray diffraction, and plasma atomic emission spectroscopy) suggest that the use of chromium on iron oxide systems improved their hydrogen storage capacity. This is related to the capacity of chromium to modify the iron oxide reduction profile when Cr was incorporated. A direct reduction from Fe3O4 to Fe was observed as the mechanism for H2 storage. In addition, natural oxides as commercial Superfine and Densinox-L oxides are proved to be suitable materials to store and purify H2 due to their high stability during different cycles of reduction and oxidation. The best results among the natural ones were Densinox-L and among the synthetic ones Fe-10Cr.",

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AU - Requies, J.

AU - Güemez, M. B.

AU - Perez Gil, S.

AU - Barrio, V. L.

AU - Cambra, J. F.

AU - Izquierdo, U.

AU - Arias, P. L.

PY - 2013/7

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AB - In this paper, the hydrogen storage capacity of some synthetic and natural iron oxides is presented. The results of the activity tests and characterization techniques of natural and synthetic iron oxides (N2 adsorption-desorption isotherms, temperature-programmed reduction, X-ray diffraction, and plasma atomic emission spectroscopy) suggest that the use of chromium on iron oxide systems improved their hydrogen storage capacity. This is related to the capacity of chromium to modify the iron oxide reduction profile when Cr was incorporated. A direct reduction from Fe3O4 to Fe was observed as the mechanism for H2 storage. In addition, natural oxides as commercial Superfine and Densinox-L oxides are proved to be suitable materials to store and purify H2 due to their high stability during different cycles of reduction and oxidation. The best results among the natural ones were Densinox-L and among the synthetic ones Fe-10Cr.

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Natural and synthetic iron oxides for hydrogen storage and purification

Abstract

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