“…According to the principle, thermal energy storage can be divided into sensible heat storage, phase change latent heat storage, and thermochemical energy storage (TCES) . In which, thermochemical heat storage has been the most widely used due to its incomparable advantages, including high energy density, easily transported products. − Among many thermochemical energy storage systems, the calcium looping process (CaL), which can be traced back to the 1970s, has good application prospects due to its high reaction enthalpy and energy density. , In recent years, a lot of research has been focused on the CaL. − The specific reaction of CaL can be described by the chemical formulas and …”