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Reversible Hydration Behavior of CaCl2 at High H2O Partial Pressures for Thermochemical Energy Storage

Molenda, Margarethe and Stengler, Jana and Linder, Marc and Wörner, Antje (2013) Reversible Hydration Behavior of CaCl2 at High H2O Partial Pressures for Thermochemical Energy Storage. Thermochimica Acta (560), pp. 76-81. Elsevier. DOI: http://dx.doi.org/10.1016/j.tca.2013.03.020 ISSN 0040-6031

Full text not available from this repository.

Official URL: http://www.sciencedirect.com/science/article/pii/S0040603113001548

Abstract

Compared to other energy storage concepts, thermochemical energy storage stands out with high storage densities and the possibility of heat transformation. However, up to now only few chemical reactions have been characterized sufficiently for this application. In this paper, calcium chloride is analyzed as a possible storage material. CaCl2 is known for its high deliquescence. Its exothermal hydration reaction can be used for storage applications from 80 °C to 200 °C. This paper reports on the hydration and dehydration behavior at different partial vapor pressures. Reversibility, intermediate reaction steps and their stability are studied. The presented results are in good agreement with literature data. The hydration reaction provides good reversibility and cycling stability for 20 cycles. Therefore, CaCl2 can be considered as a reference material for thermochemical storage application in the temperature range studied.

Item URL in elib:https://elib.dlr.de/85638/
Document Type:Article
Title:Reversible Hydration Behavior of CaCl2 at High H2O Partial Pressures for Thermochemical Energy Storage
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Molenda, Margarethe Margarethe.Molenda (at) dlr.deUNSPECIFIED
Stengler, JanaUNSPECIFIEDUNSPECIFIED
Linder, Marcmarc.linder (at) dlr.deUNSPECIFIED
Wörner, Antjeantje.woerner (at) dlr.deUNSPECIFIED
Date:20 May 2013
Journal or Publication Title:Thermochimica Acta
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :http://dx.doi.org/10.1016/j.tca.2013.03.020
Page Range:pp. 76-81
Publisher:Elsevier
ISSN:0040-6031
Status:Published
Keywords: Energy storage; Thermochemical; Chemical heat transformer; Hydration; Salt hydrate; Calcium chloride
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion and Use (old)
HGF - Program Themes:Energy-efficient Processes (old)
DLR - Research area:Energy
DLR - Program:E EV - Energy process technology
DLR - Research theme (Project):E - Thermochemische Prozesse (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Thermal Process Technology
Deposited By: Molenda, Margarethe
Deposited On:02 Dec 2013 10:28
Last Modified:02 Dec 2013 10:28

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