Water thermolysis by means of the sodium manganese ferrite cycle for sustainable hydrogen production is reviewed, with particular focus on known elementary chemical processes taking place on solid substrates in the 600e800 C temperature range. For the purpose, in-situ high temperature x-ray diffraction technique has been utilized to observe structural transformations produced by both temperature and reactive environment. The water-splitting reaction and the regeneration of initial reactants are described as multistep reactions, in which the role of carbon dioxide, through carbonation and decarbonation reactions is highlighted. A thermodynamic phase stability diagram is reported for the system MnFe2O4/Na2CO3/CO2.

Chemical aspects of the water-splitting thermochemical cycle based on sodium manganese ferrite

La Barbera, Aurelio;Bellusci, Mariangela;Alvani, Carlo;Padella, Franco;Varsano, Francesca
2012

Abstract

Water thermolysis by means of the sodium manganese ferrite cycle for sustainable hydrogen production is reviewed, with particular focus on known elementary chemical processes taking place on solid substrates in the 600e800 C temperature range. For the purpose, in-situ high temperature x-ray diffraction technique has been utilized to observe structural transformations produced by both temperature and reactive environment. The water-splitting reaction and the regeneration of initial reactants are described as multistep reactions, in which the role of carbon dioxide, through carbonation and decarbonation reactions is highlighted. A thermodynamic phase stability diagram is reported for the system MnFe2O4/Na2CO3/CO2.
Hydrogen production, water splitting, thermochemical cycle,CO2 capture, MnFe2O4, HT XRD
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12079/614
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