| Titolo | Chemical equilibria involved in the oxygen-releasing step of manganese ferrite water-splitting thermochemical cycle |
|---|---|
| Tipo di pubblicazione | Articolo su Rivista peer-reviewed |
| Anno di Pubblicazione | 2008 |
| Autori | Seralessandri, L., Bellusci M., Alvani C., La Barbera A., Padella F., and Varsano F. |
| Rivista | Journal of Solid State Chemistry |
| Volume | 181 |
| Paginazione | 1992-1997 |
| ISSN | 00224596 |
| Parole chiave | Chemical equilibriums, Energy sustainability, Ferrites, Hydrogen production, Manganese, Manganese ferrite, Manganese ferrites, Na de-intercalation, Nonmetals, Oxygen, Rietveld analysis, Sodium, Thermochemical water-splitting cycle, Water splitting cycles, Water-splitting, XRD |
| Abstract | Sodium ferrimanganite carbonatation reaction was investigated at different temperatures/carbon dioxide partial pressures to evaluate the feasibility of the thermochemical water-splitting cycle based on the MnFe2O4/Na2CO3/Na(Mn1/3Fe2/3)O2 system. After thermal treatments in selected experimental conditions, the obtained powder samples were investigated by using the X-ray diffraction (XRD) technique and Rietveld analysis. Two different lamellar Na1-xMn1/3Fe2/3O2-δ phases were observed together with the expected MnFe2O4/Na2CO3 mixture. Different equilibrium regions among sodium-depleted lamellar phases, manganese ferrite and sodium carbonate were found as a function of the different reaction conditions. A hypothesis concerning the regeneration mechanism of the initial compounds is proposed. Chemical equilibrium between stoichiometric and sub-stoichiometric forms of sodium ferrimanganite and sodium carbonate formation/dissociation appears to be essential factors governing the oxygen-releasing step of the manganese ferrite thermochemical cycle. © 2008 Elsevier Inc. All rights reserved. |
| Note | cited By 9 |
| URL | https://www.scopus.com/inward/record.uri?eid=2-s2.0-52749084911&doi=10.1016%2fj.jssc.2008.04.014&partnerID=40&md5=a7c8a579ec4fc6aa3a01a40ece34e616 |
| DOI | 10.1016/j.jssc.2008.04.014 |
| Citation Key | Seralessandri20081992 |
