Thermal properties and thermal stability of the ternary eutectic salt NaCl-CaCl2-MgCl2 used in high-temperature thermal energy storage process

Du, Lichan; Ding, Jing; Tian, Heqing; Wang, Weilong; Wei, Xiaolan; Song, Meimei

doi:10.1016/j.apenergy.2017.03.096

Cited by 60 publications

(16 citation statements)

References 16 publications

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“…[1][2][3][4] Compared with the conventional nitrate/nitrite and carbonate salts, MgCl 2 -based chloride salts have much higher decomposition temperature and lower material cost, which is beneficial to increase the energy conversion efficiency and decrease the cost of the CSP system. [5] It has been demonstrated that MgCl 2 -KCl [1] and MgCl 2 -CaCl 2 -NaCl [2] eutectic chloride salts are satisfactory and acceptable to serve as a high-temperature HTFs. Understanding the macroscopic properties and microstructure of such salts will be DOI: 10.1002/adts.202000180 helpful for the design of efficient HTFs.…”

Section: Introductionmentioning

confidence: 99%

“…MgCl 2 -based chloride salts have gained increasing attention as a promising candidate for heat transfer fluid (HTF) in the concentrated solar thermal power (CSP) systems. [1][2][3][4] Compared with the conventional nitrate/nitrite and carbonate salts, MgCl 2 -based chloride salts have much higher decomposition temperature and lower material cost, which is beneficial to increase the energy conversion efficiency and decrease the cost of the CSP system. [5] It has been demonstrated that MgCl 2 -KCl [1] and MgCl 2 -CaCl 2 -NaCl [2] eutectic chloride salts are satisfactory and acceptable to serve as a high-temperature HTFs.…”

Section: Introductionmentioning

confidence: 99%

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Molecular Dynamics Simulations of Molten Magnesium Chloride Using Machine‐Learning‐Based Deep Potential

Liang

2020

Advcd Theory and Sims

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In previous work, molten magnesium chloride has been investigated using first-principles molecular dynamics (FPMD) simulations based on density functional theory (DFT). However, such simulations are computationally intensive and therefore are restricted in terms of simulated size and time. In this work, a machine learning-based deep potential (DP) is trained to accelerate the molecular dynamics simulation of molten magnesium chloride. The trained DP can accurately describe the energies and forces with the prediction errors in energy and force being 1.76 × 10 −3 eV/atom and 4.76 × 10 −2 eV Å −1 , respectively. Applying the deep potential molecular dynamics (DPMD) approach, simulations can be performed with more than 1000 atoms, which is infeasible for FPMD simulations. Additionally, the partial radial distribution functions, angle distribution functions, densities, and self-diffusion coefficients predicted by DPMD simulations are also in reasonable agreement with FPMD or experimental results. This work shows that the DP enables higher efficiency and similar accuracy relative to DFT, exhibiting a bright application prospect in modeling molten salt systems.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Simulations of Molten Magnesium Chloride Using Machine‐Learning‐Based Deep Potential

Liang

2020

Advcd Theory and Sims

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“…It presents thermal stability and exhibits slow weightless in the temperature below 600˚C. When the temperature exceeds 600˚C, the binary sodium salt presents unstable and is broken down to volatilize [22], resulting in the rapid weight loss in TG2 process. The TG2 weightlessness reaction may be made up of three stages i.e.…”

Section: Plos Onementioning

confidence: 99%

Investigation of organic impurity and its occurrence in industrial waste salt produced by physicochemical process

Zhao

Xu²,

Wang

et al. 2021

PLoS ONE

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Industrial waste salt is classified as hazardous waste to the environment. The organic impurity and its occurrence in industrial waste salt affect the salt resource utilization. In this paper, composition quantitative analysis, XRD, TG-DSC, SEM/FIB-SEM coupled with EDS, FTIR, XPS and GC-Ms were chosen to investigate the organic impurity and its occurrence in industrial waste salt. The organic impurities owe small proportion (1.77%) in the specimen and exhibit weak thermal stability within the temperature of 600°C. A clear definition of organic impurity, including 11 kinds of organic compounds, including aldehyde, benzene and its derivatives etc., were detected in the industrial waste salt. These organic impurities, owing (C-O/C-O-C, C-OH/C = O, C–C/CHx/C = C etc.)-containing function group substance, are mainly distributed both on the surface and inside of the salt particles. Meanwhile, the organic substance may combine with metal cations (Ni2+, Mg2+, Cu2+ etc.) through functional groups, such as hydroxide, carbonyl etc., which increases its stability in the industrial waste salt. These findings provide comprehensive information for the resource utilization of industrial waste salt from chemical industry etc.

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“…Myers et al [33] evaluated and selected single and binary chlorides suitable for PCMs based on the criteria that the cost was lower than $0.2/kJ latent heat. Du et al [34] prepared NaCl-CaCl2-MgCl2 eutectics and measured melting temperature, latent heat and specific heat capacity to be 694 K, 201.5 kJ/kg and 1.49 kJ/(kg•K), respectively, with good thermal stability at 923 K.…”

Section: Inorganic Salts and Their Eutecticsmentioning

confidence: 99%

Medium- and high-temperature latent and thermochemical heat storage using metals and metallic compounds as heat storage media: A technical review

et al. 2020

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Thermal properties and thermal stability of the ternary eutectic salt NaCl-CaCl2-MgCl2 used in high-temperature thermal energy storage process

Cited by 60 publications

References 16 publications

Molecular Dynamics Simulations of Molten Magnesium Chloride Using Machine‐Learning‐Based Deep Potential

Molecular Dynamics Simulations of Molten Magnesium Chloride Using Machine‐Learning‐Based Deep Potential

Investigation of organic impurity and its occurrence in industrial waste salt produced by physicochemical process

Medium- and high-temperature latent and thermochemical heat storage using metals and metallic compounds as heat storage media: A technical review

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