(584g) Identifying the Oxidation Kinetics from Fe Doped Magnesium Manganate Systems

Increasing deployment of renewable electricity has heightened the need for advancements in energy storage to counteract the intermittency problems intrinsic to renewable resources. Thermochemical energy storage (TCES) shows potential as a long duration storage method for thermal energy, offering higher energy densities compared to the sensible or latent energy storage alternatives. Critical to the deployment of TCES is identifying suitable reactive materials. Oxygen exchange reduction/oxidation metal oxides are of interest for their compatibility with high operating temperature, and open loop systems, which eliminates the need for additional gas storage. The MgMn₂O₄/ MgO-MnO system has been studied as a potential TCES material as it combines low cost, reactive stability, and high operating temperatures and energy density. We report on the effects of small concentration Fe doping on the kinetics governing the MgMn₂O₄/MgO-MnO system. The oxidation kinetics are studied isothermally and contextualized with thermodynamic insight in order to extract the kinetic parameters.