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.
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Fuel Technology
- Condensed Matter Physics
- Energy Engineering and Power Technology
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