Preparation and thermophysical properties of a novel form-stable CaCl2·6H2O/sepiolite composite phase change material for latent heat storage

Cui, Weiwei; Zhang, Huanzhi; Xia, Yongpeng; Zou, Yongjin; Xiang, Cuili; Chu, Hailiang; Qiu, Shujun; Xu, Fen; Sun, Lidong

doi:10.1007/s10973-017-6170-2

Cited by 32 publications

(12 citation statements)

References 22 publications

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“…The sample particles sieved to 170–200 μm in diameter were used to synthesize MB. The clay mineral samples were immersed in 1 M-HCl(aq) and the slurry was stirred for approximately 10 h to remove the CaCO 3 impurity included in the clay mineral [60]. The precipitate was filtered and washed repeatedly until the chloride ions were not detected in the filtrates against AgNO 3 (aq).…”

Section: Methodsmentioning

confidence: 99%

Thermal Decomposition of Maya Blue: Extraction of Indigo Thermal Decomposition Steps from a Multistep Heterogeneous Reaction Using a Kinetic Deconvolution Analysis

Yamamoto

Koga

2019

Molecules

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Examining the kinetics of solids’ thermal decomposition with multiple overlapping steps is of growing interest in many fields, including materials science and engineering. Despite the difficulty of describing the kinetics for complex reaction processes constrained by physico-geometrical features, the kinetic deconvolution analysis (KDA) based on a cumulative kinetic equation is one practical method of obtaining the fundamental information needed to interpret detailed kinetic features. This article reports the application of KDA to thermal decomposition of clay minerals and indigo–clay mineral hybrid compounds, known as Maya blue, from ancient Mayan civilization. Maya blue samples were prepared by heating solid mixtures of indigo and clay minerals (palygorskite and sepiolite), followed by purification. The multistep thermal decomposition processes of the clay minerals and Maya blue samples were analyzed kinetically in a stepwise manner through preliminary kinetic analyses based on a conventional isoconversional method and mathematical peak deconvolution to finally attain the KDA. By comparing the results of KDA for the thermal decomposition processes of the clay minerals and the Maya blue samples, information about the thermal decomposition steps of the indigo incorporated into the Maya blue samples was extracted. The thermal stability of Maya blue samples was interpreted through the kinetic characterization of the extracted indigo decomposition steps.

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Section: Methodsmentioning

confidence: 99%

Thermal Decomposition of Maya Blue: Extraction of Indigo Thermal Decomposition Steps from a Multistep Heterogeneous Reaction Using a Kinetic Deconvolution Analysis

Yamamoto

Koga

2019

Molecules

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“…Composite (70% CaCl 2 ·6H 2 O) shows good stability in the temperature range from 25 to 100°C and have melting enthalpy 87.9 J/g. Sepiolite reduced both phase separation and the supercooling effect of CaCl 2 ·6H 2 O 81 …”

Section: Problems and Possible Solutions For Salt Hydrates For Tes Symentioning

confidence: 97%

Inorganic salt hydrate for thermal energy storage application: A review

Purohit

Sistla

2020

Energy Storage

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Salt hydrates are one of the most common inorganic compounds that are used as phase change material (PCM). These are available for a wide range of phase transition temperature for thermal energy storage (TES) application. They have some most desired properties for TES applications like high latent heat value, good thermal conductivity, nonexpensive, and were nonflammable. Besides these, due to the undesirable properties like phase segregation, supercooling, and corrosion to the containers, this PCM not recommended for TES application. To mitigate these issues and to make salt hydrates suitable in TES application, much research has been carried out in past years. This main highlight of this article is to provide a comprehensive overview of the use of salt hydrates, their applications and summarize the research outcomes reported by various researchers to every issue for its TES application. This summarized information will be useful to those who are interested to work on this research area. Along with this literature focuses on the advantages, disadvantages, and mechanism of salt hydrates for TES system during its thermal cycle process.

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“…Additionally, composite demonstrated good thermal reliability after 1000 heating/cooling cycles. Cui et al prepared CaCl 2 •6H 2 O/sepiolite composite by vacuum impregnation method [79]. The sepiolite was pretreated with the hydrochloric acid, calcinated and modified with propyltrimethoxysilance.…”

Section: Sepiolite-based Pcm Compositesmentioning

confidence: 99%

Clay Composites for Thermal Energy Storage: A Review

et al. 2020

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The development of novel materials and approaches for effective energy consumption and the employment of renewable energy sources is one of the current trends in modern material science. With this respect, the number of researches is focused on the effective harvesting and storage of solar energy for various applications. Phase change materials (PCMs) are known to be able to store thermal energy of the sunlight due to adsorption and release of latent heat through reversible phase transitions. Therefore, PCMs are promising as functional additives to construction materials and paints for advanced thermoregulation in building and industry. However, bare PCMs have limited practical applications. Organic PCMs like paraffins suffer from material leakage when undergoing in a liquid state while inorganic ones like salt hydrates lack long-term stability after multiple phase transitions. To avoid this, the loading of PCMs in porous matrices are intensively studied along with the thermal properties of the resulted composites. The loading of PCMs in microcontainers of natural porous or layered clay materials appears as a simple and cost-effective method of encapsulation significantly improving the shape and cyclic stability of PCMs. Additionally, the inclusion of functional clay containers into construction materials allows for improving their mechanical and flame-retardant properties. This article summarizes the recent progress in the preparation of composites based on PCM-loaded clay microcontainers along with their future perspectives as functional additives in thermo-regulating materials.

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Preparation and thermophysical properties of a novel form-stable CaCl2·6H2O/sepiolite composite phase change material for latent heat storage

Cited by 32 publications

References 22 publications

Thermal Decomposition of Maya Blue: Extraction of Indigo Thermal Decomposition Steps from a Multistep Heterogeneous Reaction Using a Kinetic Deconvolution Analysis

Thermal Decomposition of Maya Blue: Extraction of Indigo Thermal Decomposition Steps from a Multistep Heterogeneous Reaction Using a Kinetic Deconvolution Analysis

Inorganic salt hydrate for thermal energy storage application: A review

Clay Composites for Thermal Energy Storage: A Review

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