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Superior Performance of Ca(OH)2 -CaO-H2 O System Doped with Cerium and Lithium for Thermochemical Energy Storage

Lin Zhu, Ya-Ting Li, Deng-Yu Wang, En-Xu Ren, Zhi-Bin Xu*, Qin-Pei Wu*

School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488, China

*Corresponding author: Prof. Dr. Qin-Pei Wu, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, China. E-mail: [email protected]

Received: December 07, 2021

Published: January 05, 2022

Citation: Wu QP. (2022). Superior Performance of Ca(OH)2-CaO-H2O System Doped with Cerium and Lithium for Thermochemical Energy Storage. Catal Res. 2(1):02. 

Copyright: Wu QP. © (2022).


Thermochemical energy storage is a next generation technology and also an efficient solution for large-scale use of solar energy. Lime (CaO) doped with cerium nitrate (Ce(NO3)3) and lithium hydroxide (LiOH) has been demonstrated to be an excellent energy storage material via the dehydration-hydration process. The heat–storage rate is massively enhanced, by 173–fold. The dehydration conversion ratio increases by up to 98% (65.3–fold) in 28 min. The cycling stability of Ca(OH)2-Ce(NO3)3-LiOH composites in the process of thermal storage and release has also been greatly improved. The peak temperature of dehydration is reduced significantly from 418 to 341℃. The activation energy and the pre-exponential factor lnA for Ca(OH)2 dehydration decrease by 34.6% and 29.4%, respectively. The crystal parameters and the crystal volume of Ca(OH)2 are enlarged. Particle size and agglomeration are decreased. The kinetic equations for dehydration could be leveraged in future for the purpose of informing reactor design and simulations.

Keywords: calcium, hydroxide, cerium, lithium, thermal energy, energy storage

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