Reduction of iron-manganese oxide particles in a lab-scale packed-bed reactor for thermochemical energy storage

摘要

A packed-bed reactor heated with an IR furnace is designed and fabricated for high-temperature thermochemical energy storage (TCES) studies using 0.5-1.0 mm particles composed of iron-manganese oxide with a molar ratio of Fe/Mn 2:1 (Fe67) as the storage material. An axisymmetric, two-dimensional, transient model accounting for heat transfer (conduction, convection, and radiation), mass transfer, and thermochemical reaction kinetics is developed to describe the reduction reaction of Fe67 in the packed-bed reactor. The model and experiments are in good agreement, indicating that the model is useful for providing a fundamental understanding of the process. (C) 2020 Elsevier Ltd. All rights reserved.