Abstract The reversible dissociation/carbonation of metal carbonates, performed in fluidized bed reactors, is one of the most promising technological solution for thermochemical energy storage (TCES) in concentrating solar power plants (CSP). In this framework, the SrCO3/SrO system is receiving increasing interest due to its high energy density (4 GJ/m3) and working temperatures (up to 1200 °C). As the more investigated CaCO3/CaO couple, also SrO undergoes a dramatic drop of reactivity over multiple carbonation/calcination cycles due to sintering. Even though the potentiality of this system has already been proved by thermo-gravimetric analyses, its actual reaction performances in a fluidized bed are strongly dependent on the gas-solid contact efficiency and heat/mass transfer between the gaseous and solid phase. In this work, the cyclic carbonation/calcination of the SrO/SrCO3 system for TCES-CSP has been investigated by thermo-gravimetric analysis and, for the first time, in a lab-scale fluidized bed rig, thus providing useful applicative insights. A new Al2O3-stabilized composite has been synthesized, i.e. Al2O3 has been added to SrO/SrCO3 system as both sintering inhibitor and flow conditioner. In particular, composite materials with different Al2O3/SrO composition have been synthesized to investigate the effect of the inhibitor amount on both the fluidizability and energy storage performances.

中文翻译：

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碳酸锶在热化学储能中的应用

摘要 在流化床反应器中进行的金属碳酸盐的可逆解离/碳酸化是聚光太阳能发电厂 (CSP) 中最有前途的热化学储能 (TCES) 技术解决方案之一。在此框架中，SrCO3/SrO 系统因其高能量密度（4 GJ/m3）和工作温度（高达 1200 °C）而受到越来越多的关注。作为更多研究的 CaCO3/CaO 对，由于烧结，SrO 在多次碳化/煅烧循环中的反应性也急剧下降。尽管该系统的潜力已通过热重分析证明，但其在流化床中的实际反应性能在很大程度上取决于气固接触效率和气固相之间的热/质量传递。在这项工作中，用于 TCES-CSP 的 SrO/SrCO3 系统的循环碳酸化/煅烧已通过热重分析进行了研究，并且首次在实验室规模的流化床设备中进行了研究，从而提供了有用的应用见解。合成了一种新的Al2O3 稳定复合材料，即将Al2O3 添加到SrO/SrCO3 体系中作为烧结抑制剂和流动调节剂。特别是，合成了具有不同 Al2O3/SrO 成分的复合材料，以研究抑制剂用量对流化性和储能性能的影响。Al2O3 已添加到 SrO/SrCO3 系统中作为烧结抑制剂和流动调节剂。特别是，合成了具有不同 Al2O3/SrO 成分的复合材料，以研究抑制剂用量对流化性和储能性能的影响。Al2O3 已添加到 SrO/SrCO3 系统中作为烧结抑制剂和流动调节剂。特别是，合成了具有不同 Al2O3/SrO 成分的复合材料，以研究抑制剂用量对流化性和储能性能的影响。