The oxygen-releasing step in the water splitting cycle by MnFe

L. Seralessandri, M. Bellusci, F. Padella, A. Santini, F. Varsano

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Abstract

Investigation of the feasibility of the thermochemical two-step water splitting cycle based on MnFe2O4/Na2CO3system is reported. Influence of temperature and carbon dioxide pressure on the oxygen-releasing step was investigated. XRD analysis was applied to obtain phase identification of reacted powders at investigated experimental conditions. Different sodium sub-stoichiometric Na1-δ(Mn1/3Fe2/3)O2-δ/2compounds were observed and their structure determined by using Rietveld analysis. Selected experimental conditions permitted to define a T / pCO2phase diagram, showing different solid phases coexistence regions. Experimental conditions that permit complete regeneration of the initial MnFe2O4/Na2CO3mixture were identified (field I in the reported diagram), demonstrating the possibility of full chemical cyclical operation of the system. © 2008 International Association for Hydrogen Energy.
Original languageEnglish
Pages (from-to)4546 - 4550
Number of pages5
JournalInternational Journal of Hydrogen Energy
Volume34
Issue number10
DOIs
Publication statusPublished - May 2009
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

Cite this

Seralessandri, L., Bellusci, M., Padella, F., Santini, A., & Varsano, F. (2009). The oxygen-releasing step in the water splitting cycle by MnFe. International Journal of Hydrogen Energy, 34(10), 4546 - 4550. https://doi.org/10.1016/j.ijhydene.2008.08.028