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

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).

ABSTRACT

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