Use of Pressurized Oxidation of Cu2O as a Means of Improving the Performance of Redox Based Thermochemical Energy Storage Systems
- https://doi.org/10.2991/ahe.k.210202.002How to use a DOI?
- thermochemical energy storage, copper oxide, redox cycle, pressurized oxidation, thermogravimetric analysis
CuO/Cu2O is a promising redox pair for thermochemical energy storage. This is primarily because of its suitable reaction temperature, high reaction enthalpy, high oxygen-carrying capacity, wide availability, and competitive cost. In this study, the influence of pressurized oxidation on a pure CuO/Cu2O-based thermochemical energy storage system is examined experimentally. Specifically, thermogravimetric analyses (TGA) and scanning electron microscopy (SEM) are employed to assess the reaction characteristics and morphology changes of pure CuO/Cu2O. According to the results, the oxidation of Cu2O (the rate-limiting step) is found to be faster and more complete under a pressure of 5.0-15.0 bar compared to the near-ambient pressure under 1.2 bar. Meanwhile, the tests of 20 redox cycles reveal that the reactivity of Cu2O can maintain 70-90%, but the agglomeration of particles is still present as a potential issue. The concept of pressurized oxidation is then applied to a utility-scale thermochemical energy storage plant in a case study. Based on the case study, the proposed storage plant can achieve a round-trip efficiency of about 41.0% and an energy storage density of nearly 500 kJ/kg under the oxidation pressure of 10.0 bar.
- © 2021, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Sike Wu AU - Cheng Zhou AU - Behdad Moghtaderi PY - 2021 DA - 2021/02/04 TI - Use of Pressurized Oxidation of Cu₂O as a Means of Improving the Performance of Redox Based Thermochemical Energy Storage Systems BT - Proceedings of the 14th International Renewable Energy Storage Conference 2020 (IRES 2020) PB - Atlantis Press SP - 5 EP - 13 SN - 2589-4943 UR - https://doi.org/10.2991/ahe.k.210202.002 DO - https://doi.org/10.2991/ahe.k.210202.002 ID - Wu2021 ER -