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Investigation of Ca12Al14O33 Mayenite for hydration/dehydration thermochemical energy storage

Zaki, Abdelali and Gutierrez Rojas, Andrea Lucia and Schmidt, Matthias and Bielsa, Daniel and Linder, Marc Philipp and Faik, Abdessamad (2020) Investigation of Ca12Al14O33 Mayenite for hydration/dehydration thermochemical energy storage. Journal of Energy Storage. Elsevier. doi: 10.1016/j.est.2020.101647. ISSN 2352-152X.

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Official URL: https://www.sciencedirect.com/science/article/abs/pii/S2352152X20314845?via%3Dihub


Thermal energy storage using a reversible chemical reaction is a key parameter for increasing the storage capacity especially for medium and high temperature applications. The reversible hydration/dehydration reaction of calcium hydroxide Ca(OH)2 to calcium oxide CaO is among the most investigated system due to its reaction cyclability and interesting operating temperature above 450 ºC suitable for high temperature applications. However, the indicated reaction temperature was considered too high for some industrial applications which limit a further development of thermal energy storage technologies using this promising reaction system. In this regard, the material development is a key point to broaden the application of sustainable technologies. In this work, the investigation of Mayenite with general formula Ca12Al14O33 as a thermochemical energy storage material was conducted. Thereby, it was confirmed the possibility of the pair Ca12Al14O12(OH)42/Ca12Al14O33 to store and release the heat through chemical reaction thanks to a novel activation process of the pristine Mayenite that is presented for the first time in this work. This study might help to identify new pairs based on materials that have already been classified as inactive for the hydration/dehydration reaction. In addition, it was found that the hydration reaction temperature of Ca12Al14O12(OH)42/Ca12Al14O33 pair of 228ºC is much lower compared to that of CaO/Ca(OH).

Item URL in elib:https://elib.dlr.de/139528/
Document Type:Article
Title:Investigation of Ca12Al14O33 Mayenite for hydration/dehydration thermochemical energy storage
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Zaki, Abdelaliazaki (at) cicenergigune.comUNSPECIFIED
Gutierrez Rojas, Andrea LuciaAndrea.GutierrezRojas (at) dlr.dehttps://orcid.org/0000-0002-6313-8264
Schmidt, MatthiasMatthias.Schmidt (at) dlr.deUNSPECIFIED
Bielsa, DanielCIC EnergiguneUNSPECIFIED
Linder, Marc PhilippMarc.Linder (at) dlr.deUNSPECIFIED
Faik, AbdessamadCIC EnergiguneUNSPECIFIED
Date:October 2020
Journal or Publication Title:Journal of Energy Storage
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.est.2020.101647
Series Name:ELSEVIER
Keywords:Thermochemical heat storage; Gas-Solid reaction; Hydration/Dehydration reaction; Calcium ALuminates; Mayenite
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Thermal Energy Storage
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Thermochemical Processes (Storage) (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Thermal Process Technology
Deposited By: Gutierrez Rojas, Andrea Lucia
Deposited On:16 Dec 2020 20:51
Last Modified:16 Dec 2020 20:51

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