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Additive effect on lithium silicate pellets for thermochemical energy storage

Takas, Hiroki and Nihei, Takuya and Kim, Seon Tae and Kato, Yukitaka (2021) Additive effect on lithium silicate pellets for thermochemical energy storage. Journal of Chemical Engineering of Japan, 54 (5), pp. 195-200. Society of Chemical Engineers, Japan. doi: 10.1252/jcej.20we097. ISSN 0021-9592.

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Official URL: https://www.jstage.jst.go.jp/article/jcej/54/5/54_20we097/_article/-char/ja/


The global increase in energy consumption has caused serious environmental problems, especially CO2 emissions. In general, CO2 is produced from the combustion and oxidation reaction at high temperature. The use of thermochemical energy storage is considered and appropriate approach to enhance the utilization of surplus or waste heat from high temperature industrial processes. So far, there are very few reports that have been published for high temperature thermochemical energy storage. In this study, high temperature thermochemical energy storage based on the lithium orthosilicate/carbon dioxide (Li4SiO4/CO2) reaction was developed. A new candidate storage material was fabricated with four different concentrations of the potassium carbonate (K2CO3) additive (0, 6, 11, 17, and 33 mol %), in the shape of pellets, from the point of energy density view. On the basis of the results of the carbonation and decarbonation experiments, the highest thermal output and storage densities were recorded for a pellet possessing a 11 mol% concentration of the K2CO3 additive. Furthermore, this pellet, LK11, showed cyclic ability with repeat reactions over twenty cycles. Thus, LK11 pellet can be used as a thermochemical energy storage material because of its ability to store and release heat at high temperatures, ranging from 550 to 700°C.

Item URL in elib:https://elib.dlr.de/143846/
Document Type:Article
Title:Additive effect on lithium silicate pellets for thermochemical energy storage
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Takas, HirokiTokyo Institute of TechnologyUNSPECIFIEDUNSPECIFIED
Nihei, TakuyaTokyo Institute of TechnologyUNSPECIFIEDUNSPECIFIED
Kim, Seon TaeUNSPECIFIEDhttps://orcid.org/0000-0002-4388-3996UNSPECIFIED
Date:20 May 2021
Journal or Publication Title:Journal of Chemical Engineering of Japan
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 195-200
Publisher:Society of Chemical Engineers, Japan
Keywords:Thermochemical Energy Storage, CO2 Absorption, Metal Oxides, Carbonate salt.
HGF - Research field:Energy
HGF - Program:Materials and Technologies for the Energy Transition
HGF - Program Themes:High-Temperature Thermal Technologies
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Low-Carbon Industrial Processes, E - Thermochemical Processes
Location: Zittau
Institutes and Institutions:Institute of Low-Carbon Industrial Processes > High-Temperature Heat Pumps
Institute of Low-Carbon Industrial Processes > Low-Carbon Reducing Agents
Deposited By: Kim, SeonTae
Deposited On:16 Dec 2021 16:33
Last Modified:16 Dec 2021 16:33

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