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Iwase, D., Kobayashi, N., Esaki, T., Kita, H. and Yamashita, S. (2015) Basic Study on Development of Heat Storage Technology at 500°C Using Ca(OH)2. Proceedings of the 34th Annual Meeting of Japan Society of Energy and Resources, Tokyo, 9-10 June 2015, 15-16.

has been cited by the following article:

• TITLE: Long-Term Durability and Reactivation of Thermochemical Heat Storage Driven by the CaO/Ca(OH)2 Reversible Reaction

  AUTHORS: Kazuki Kuwata, Takehiro Esaki, Daichi Iwase, Hiroyuki Ito, Shijie Li, Xixian Yang, Hongyu Huang, Noriyuki Kobayashi

  KEYWORDS: Thermochemical Heat Storage, Durability, Repetitive Reaction, Reactivation, CaO/Ca(OH)2 Reaction

  JOURNAL NAME: Journal of Materials Science and Chemical Engineering, Vol.5 No.11, November 14, 2017

  ABSTRACT: Thermochemical heat storage is a promising technology for improving thermal energy efficiency. To investigate the durability of the CaO/Ca(OH)2 reaction and develop a reactivation method, repetitive charging/discharging operation of a packed bed reactor with a thick packed bed was conducted, and variations in the discharging behavior, final conversion, and reactant activity were investigated. Owing to the formation of a deactivated sintered reactant block, the discharging time halved and the final conversion ratio decreased by the 53rd discharging operation. To enhance durability, a reactivation method using high-pressure vapor was implemented during the 54th discharging operation. Following reactivation, the final conversion increased 15%, and the discharging time tripled when compared with the discharging operation before reactivation, confirming the success of this simple reactivation method.