Calcium-based composites directly irradiated by solar spectrum for thermochemical energy storage

Performance enhancement mechanisms of calcium-based thermochemical energy storage compounds: insights from first-principles and experimental investigations

“…Subsequently, the gas was switched to CO 2 , and the material was maintained at 700 °C for an additional 10 min, allowing sufficient time for the carbonation reaction to occur. The heat release capacity is dened as eqn (7), where Q carb equals the integration of the heat ow signal output by STA during the rapid carbonation stage. The heat ow integration was performed using the PerkinElmer Thermal Analysis Soware, and the sigmoidal baseline was selected for integration.…”

“…5,6 Within thermochemical energy storage, the CaCO 3 /CaO system stands out as the most promising solution for large-scale industrial applications because of the low cost of raw materials, high working temperature of over 700 °C, and substantial energy storage density of 1783 kJ kg −1 . 7 Its energy storage and release processes are achieved by the following chemical reaction (eqn (1)). CaCO 3 (s) ⇌ CaO(s) + CO 2 (g) Δ H = 178.3 kJ mol −1 …”

“…5,6 Within thermochemical energy storage, the CaCO 3 /CaO system stands out as the most promising solution for large-scale industrial applications because of the low cost of raw materials, high working temperature of over 700 °C, and substantial energy storage density of 1783 kJ kg −1 . 7 Its energy storage and release processes are achieved by the following chemical reaction (eqn (1)). In addition to high energy density, the desired thermal properties of a TCES material also include cyclic stability, which means the material can maintain a high energy density over multiple cycles.…”

Influence of Fluidised Bed Inventory on the Performance of Limestone Sorbent in Calcium Looping for Thermochemical Energy Storage

“…Novel strategies to directly absorb solar energy using calcium-based composite TCES materials are under scrutiny [39], with the aim of simultaneously boosting solar absorption and improving cycling stability in integrated CaL-CSP systems. The introduction of inert materials in synthetic Ca-based sorbents with the aim of improving their optical performance in terms of solar energy absorptivity, through the use of particles with better light absorption properties in the reactor atmosphere, is being addressed as well [40][41][42][43].…”

Excellent Absorption of LaCoxO3 Over Full Solar Spectrum and Direct Photothermal Energy Storage of Ca(OH)2–LaCoxO3

“…Ordinarily, thermal-energy-storage materials (TESM) absorb sunlight very weakly, which must be enhanced by absorbers to harvest light. Some metal oxides were employed to enhance the light absorption of CaCO 3 such as FeMnO 3 -Fe 2 O 3 , oxide mixture of CuO-(CoO x /CrO x /FeO x /MnO x ), SiC-MnO 2 , FeO x /Al 2 O 3 , MnO x /Cr 2 O 3 , and co-doped Ce/Co/Mn oxide [13][14][15][16][17][18]. Besides the absorption, however, photothermal conversion, photothermal temperature, and the cyclostability of photothermal storage and heat releasing are also vital index to evaluate the performance of a direct photothermal-storage system.…”