Thermochemical energy storage using calcium magnesium acetates under low CO2 pressure conditions

卷:63

Article

关键词: CONCENTRATED SOLAR POWER;    OF-THE-ART;    MULTICYCLE ACTIVITY;    THERMAL STORAGE;    INTEGRATION;    CAPTURE;    CALCINATION;    PERFORMANCE;    TECHNOLOGIES;    SORBENTS;   

DOI  :  10.1016/j.est.2023.106958

来源: SCIE

【 摘 要 】

The calcium looping multicycle performance of CaO-based materials, derived from calcium magnesium acetates with different Mg content were tested under experimental conditions compatible with thermochemical energy storage. In order to reduce the sintering-induced decay in performance, calcination at an absolute CO2 pressure of 0.1 bar and 0.01 bar is implemented. CaO carbonation is performed at standard 1 bar CO2 conditions. The samples can be fully calcined in short residence times. Samples with MgO present high cycling stability, even when the MgO content is as low as 5 mol%. The effective conversion values lie within the range 0.88-0.84 over ten calcination/carbonation cycles, which provides an accumulated energy storage density of 90.9 GJ/m3. This outstanding reactivity is related with the microstructure of the sample after calcination composed of CaO nanoparticles that are highly reactive for carbonation.

【 授权许可】

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