Figure 7 - available via license: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
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-Heat release of iron, which can be obtained when the material is cooled after oxidation to ambient conditions (here: T0 = 20°C).
Source publication
Storing electrical energy for long periods and transporting it over long distances is an essential task of the necessary transition to a CO$_2$-free energy economy. An oxidation-reduction cycle based on iron and its oxides represents a very promising technology in this regard. The present work assesses the potential of converting an existing modern...
Context in source publication
Context 1
... the mixture of oxidation gases and Fe3O4 is cooled and an equilibrium composition is assumed at the respective temperature, a heat release of 7380 kJ/kg, corresponding to the heating value of iron, is obtained. Figure 7 shows the heat-temperature diagram for this cooling process per kilogram of iron. ...
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