Thermochemical Hydrogen Storage via the Reversible Reduction and Oxidation of Metal Oxides

In this work, we perform a technical analysis of cyclic reduction and oxidation process metal oxides applied as hydrogen storage route. Hydrogen is used to reduce oxide form steam, regenerated by oxidizing the reduced with steam. The acts solid medium, which could be transported or for stationary applications. Suitable were screened according following performance indicators: specific energy demand (enthalpy change reaction), thermodynamic conversion extents, density, resistance sintering (melting point), material cost. Iron was then selected most promising candidate. A model developed determine favorable temperatures >400 °C step 100–500 release step. calculated 27% lower heating value hydrogen. Vis-a-vis other methods, iron-based exhibits drawbacks on-board mobile applications but attractive large-scale long-term