A study of the hydration and dehydration transitions of SrCl2 hydrates for use in heat storage

Melian A.R. Blijlevens; Natalia Mazur; Wessel Kooijman; Hartmut R. Fischer; Henk P. Huinink; Hugo Meekes; Elias Vlieg

doi:10.1016/j.solmat.2022.111770

A study of the hydration and dehydration transitions of SrCl₂ hydrates for use in heat storage

Melian A.R. Blijlevens
, Natalia Mazur
, Wessel Kooijman
, Hartmut R. Fischer
, Henk P. Huinink (Corresponding author)
, Hugo Meekes
, Elias Vlieg (Corresponding author)

Research output: Contribution to journal › Article › Academic › peer-review

31 Citations (Scopus)

527 Downloads (Pure)

Abstract

We have experimentally determined the main thermodynamic properties of SrCl₂, a potentially promising salt for thermochemical heat storage. We found a high energy density of 2.4 ± 0.1 GJ/m³ and proved full cyclability for at least 10 cycles going from the anhydrate to the hexahydrate without chemical degradation. We have experimentally determined the thermodynamic equilibria for each individual transition and the corresponding metastable zones. We find that the metastable zone is widest for the anhydrate to monohydrate transition and decreases with each subsequent hydration step. We have also established that the observed nucleation kinetics are highly dependent on the preparation of the sample. Depending on the preparation conditions, some seeds of the precursor phase can remain in the sample thereby influencing the induction times for the transition. In heat storage applications we recommend selecting conditions well away from the phase transition lines (at least outside the metastable zone) and to leave some seeds of the phase to be transferred in order to increase the transition speed.

Original language	English
Article number	111770
Number of pages	9
Journal	Solar Energy Materials and Solar Cells
Volume	242
DOIs	https://doi.org/10.1016/j.solmat.2022.111770
Publication status	Published - 1 Aug 2022

Funding

This research is part of the Materials for heat storage project, which received funding from the Dutch Organization for Scientific Research (NWO) in the framework of Materials for sustainability. Michael Steiger is gratefully acknowledged for sharing the p,T-data he used for the phase diagram. Additionally, we thank Ruth Anne Crothers for carefully proofreading our manuscript.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Hydration/dehydration cycling
SrCl
Thermochemical analysis
Thermochemical heat storage

Access to Document

10.1016/j.solmat.2022.111770

pdfFinal published version, 3.37 MBLicence: CC BY

Cite this

@article{07aa2970b29a4aed8cef890ff0d478e3,

title = "A study of the hydration and dehydration transitions of SrCl2 hydrates for use in heat storage",

abstract = "We have experimentally determined the main thermodynamic properties of SrCl2, a potentially promising salt for thermochemical heat storage. We found a high energy density of 2.4 ± 0.1 GJ/m3 and proved full cyclability for at least 10 cycles going from the anhydrate to the hexahydrate without chemical degradation. We have experimentally determined the thermodynamic equilibria for each individual transition and the corresponding metastable zones. We find that the metastable zone is widest for the anhydrate to monohydrate transition and decreases with each subsequent hydration step. We have also established that the observed nucleation kinetics are highly dependent on the preparation of the sample. Depending on the preparation conditions, some seeds of the precursor phase can remain in the sample thereby influencing the induction times for the transition. In heat storage applications we recommend selecting conditions well away from the phase transition lines (at least outside the metastable zone) and to leave some seeds of the phase to be transferred in order to increase the transition speed.",

keywords = "Hydration/dehydration cycling, SrCl, Thermochemical analysis, Thermochemical heat storage",

author = "Blijlevens, \{Melian A.R.\} and Natalia Mazur and Wessel Kooijman and Fischer, \{Hartmut R.\} and Huinink, \{Henk P.\} and Hugo Meekes and Elias Vlieg",

year = "2022",

month = aug,

day = "1",

doi = "10.1016/j.solmat.2022.111770",

language = "English",

volume = "242",

journal = "Solar Energy Materials and Solar Cells",

issn = "0927-0248",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - A study of the hydration and dehydration transitions of SrCl2 hydrates for use in heat storage

AU - Blijlevens, Melian A.R.

AU - Mazur, Natalia

AU - Kooijman, Wessel

AU - Fischer, Hartmut R.

AU - Huinink, Henk P.

AU - Meekes, Hugo

AU - Vlieg, Elias

PY - 2022/8/1

Y1 - 2022/8/1

N2 - We have experimentally determined the main thermodynamic properties of SrCl2, a potentially promising salt for thermochemical heat storage. We found a high energy density of 2.4 ± 0.1 GJ/m3 and proved full cyclability for at least 10 cycles going from the anhydrate to the hexahydrate without chemical degradation. We have experimentally determined the thermodynamic equilibria for each individual transition and the corresponding metastable zones. We find that the metastable zone is widest for the anhydrate to monohydrate transition and decreases with each subsequent hydration step. We have also established that the observed nucleation kinetics are highly dependent on the preparation of the sample. Depending on the preparation conditions, some seeds of the precursor phase can remain in the sample thereby influencing the induction times for the transition. In heat storage applications we recommend selecting conditions well away from the phase transition lines (at least outside the metastable zone) and to leave some seeds of the phase to be transferred in order to increase the transition speed.

AB - We have experimentally determined the main thermodynamic properties of SrCl2, a potentially promising salt for thermochemical heat storage. We found a high energy density of 2.4 ± 0.1 GJ/m3 and proved full cyclability for at least 10 cycles going from the anhydrate to the hexahydrate without chemical degradation. We have experimentally determined the thermodynamic equilibria for each individual transition and the corresponding metastable zones. We find that the metastable zone is widest for the anhydrate to monohydrate transition and decreases with each subsequent hydration step. We have also established that the observed nucleation kinetics are highly dependent on the preparation of the sample. Depending on the preparation conditions, some seeds of the precursor phase can remain in the sample thereby influencing the induction times for the transition. In heat storage applications we recommend selecting conditions well away from the phase transition lines (at least outside the metastable zone) and to leave some seeds of the phase to be transferred in order to increase the transition speed.

KW - Hydration/dehydration cycling

KW - SrCl

KW - Thermochemical analysis

KW - Thermochemical heat storage

UR - https://www.scopus.com/pages/publications/85129952261

U2 - 10.1016/j.solmat.2022.111770

DO - 10.1016/j.solmat.2022.111770

M3 - Article

AN - SCOPUS:85129952261

SN - 0927-0248

VL - 242

JO - Solar Energy Materials and Solar Cells

JF - Solar Energy Materials and Solar Cells

M1 - 111770

ER -