A novel system composed by an aqueous slurry prepared by MnO and NaOH mixture was tested for the hydrogen production in the sodium manganese oxide thermochemical cycle. The hydrogen evolution occurs at lower temperature than conventional mixtures utilized in the cycle. Experiments performed in a Temperature Programmed Desorption/Reaction apparatus (TPD/TPR) have evidenced hydrogen production around 500°C. The hydrolysis step of α-NaMnO2 has been studied and the importance to conduct hydrolysis reaction under inert gas is discussed. A manganese disproportion mechanism is hypothesized to explain the appearance of manganese (II) and manganese (IV) containing phases.
- Advanced Energy Systems Division and Solar Energy Division
Optimized Reactants Mixture and Products Hydrolysis in the Manganese Oxide Thermochemical Cycle
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Varsano, F, Bellusci, M, Alvani, C, La Barbera, A, Padella, F, & Seralessandri, L. "Optimized Reactants Mixture and Products Hydrolysis in the Manganese Oxide Thermochemical Cycle." Proceedings of the ASME 2009 3rd International Conference on Energy Sustainability collocated with the Heat Transfer and InterPACK09 Conferences. ASME 2009 3rd International Conference on Energy Sustainability, Volume 2. San Francisco, California, USA. July 19–23, 2009. pp. 459-463. ASME. https://doi.org/10.1115/ES2009-90257
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