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Thermochemical characterizations of high-stable activated alumina/LiCl composites with multistage sorption process for thermal storage

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  • Zhang, Y.N.
  • Wang, R.Z.
  • Li, T.X.

Abstract

High-stable activated alumina/LiCl composites with multistage sorption process were fabricated to store low-temperature heat below 120 °C. The worried issue of solution leakage was solved by controlling its salt content below the threshold value. The microstructure was observed by transmission electron microscopy (TEM). Research on nitrogen adsorption suggested that because of the impregnated salt, composite sorbents presented different pore structure from pure activated alumina. Based on the measured results of water isotherms, the sorption equilibrium states represented by the mass concentration of the inside LiCl solution were evaluated. Moreover, the multistage sorption process-physical adsorption, chemical adsorption and liquid-gas solution absorption were quantitative analyzed based on the capillary condensation mechanism and hydrous reaction equation. Sorption kinetics proved that the sorption capacity of composite sorbents was significantly improved compared with pure activated alumina. Sorption energy storage density was obtained by the TGA/DSC measurement. Overall, AA/LiCl composite sorbent with salt content of 14.68% was selected as the optimistic AA/LiCl composite sorbent with a sorption capacity of 0.45 g/cm3 (0.41 g/g) and an energy storage density of 318.3 kWh/m3 (1041.5 kJ/kg) at the condition of 20 °C, 80% RH with a charging temperature of 120 °C.

Suggested Citation

  • Zhang, Y.N. & Wang, R.Z. & Li, T.X., 2018. "Thermochemical characterizations of high-stable activated alumina/LiCl composites with multistage sorption process for thermal storage," Energy, Elsevier, vol. 156(C), pages 240-249.
    • Handle: RePEc:eee:energy:v:156:y:2018:i:c:p:240-249
    DOI: 10.1016/j.energy.2018.05.047
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    Cited by:

    1. Ji, Wenjie & Zhang, Heng & Liu, Shuli & Wang, Zhihao & Deng, Shihan, 2022. "An experimental study on the binary hydrated salt composite zeolite for improving thermochemical energy storage performance," Renewable Energy, Elsevier, vol. 194(C), pages 1163-1173.
    2. Scharrer, Daniel & Bazan, Peter & Pruckner, Marco & German, Reinhard, 2022. "Simulation and analysis of a Carnot Battery consisting of a reversible heat pump/organic Rankine cycle for a domestic application in a community with varying number of houses," Energy, Elsevier, vol. 261(PA).
    3. Chao, Jingwei & Xu, Jiaxing & Yan, Taisen & Wang, Pengfei & Huo, Xiangyan & Wang, Ruzhu & Li, Tingxian, 2022. "Enhanced thermal conductivity and adsorption rate of zeolite 13X adsorbent by compression-induced molding method for sorption thermal battery," Energy, Elsevier, vol. 240(C).
    4. Xu, S.Z. & Wang, R.Z. & Wang, L.W. & Zhu, J., 2019. "Performance characterizations and thermodynamic analysis of magnesium sulfate-impregnated zeolite 13X and activated alumina composite sorbents for thermal energy storage," Energy, Elsevier, vol. 167(C), pages 889-901.
    5. Manca Ocvirk & Alenka Ristić & Nataša Zabukovec Logar, 2021. "Synthesis of Mesoporous γ-Alumina Support for Water Composite Sorbents for Low Temperature Sorption Heat Storage," Energies, MDPI, vol. 14(22), pages 1-15, November.
    6. Chanchira Channoy & Somchai Maneewan & Surapong Chirarattananon & Chantana Punlek, 2022. "Development and Characterization of Composite Desiccant Impregnated with LiCl for Thermoelectric Dehumidifier (TED)," Energies, MDPI, vol. 15(5), pages 1-17, February.
    7. Marín, P.E. & Milian, Y. & Ushak, S. & Cabeza, L.F. & Grágeda, M. & Shire, G.S.F., 2021. "Lithium compounds for thermochemical energy storage: A state-of-the-art review and future trends," Renewable and Sustainable Energy Reviews, Elsevier, vol. 149(C).
    8. Frazzica, A. & Brancato, V. & Caprì, A. & Cannilla, C. & Gordeeva, L.G. & Aristov, Y.I., 2020. "Development of “salt in porous matrix” composites based on LiCl for sorption thermal energy storage," Energy, Elsevier, vol. 208(C).
    9. Mohamed Zbair & Simona Bennici, 2021. "Survey Summary on Salts Hydrates and Composites Used in Thermochemical Sorption Heat Storage: A Review," Energies, MDPI, vol. 14(11), pages 1-33, May.
    10. Chen, Ziwei & Zhang, Yanan & Zhang, Yong & Su, Yuehong & Riffat, Saffa, 2023. "A study on vermiculite-based salt mixture composite materials for low-grade thermochemical adsorption heat storage," Energy, Elsevier, vol. 278(PB).
    11. Li, Wei & Klemeš, Jiří Jaromír & Wang, Qiuwang & Zeng, Min, 2022. "Salt hydrate–based gas-solid thermochemical energy storage: Current progress, challenges, and perspectives," Renewable and Sustainable Energy Reviews, Elsevier, vol. 154(C).
    12. Ding, Zhixiong & Wu, Wei & Leung, Michael, 2021. "Advanced/hybrid thermal energy storage technology: material, cycle, system and perspective," Renewable and Sustainable Energy Reviews, Elsevier, vol. 145(C).

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