Preparation and thermal properties of stearic acid/diatomite composites as form-stable phase change materials for thermal energy storage via direct impregnation method

2015 ◽  
Vol 123 (2) ◽  
pp. 1173-1181 ◽  
Author(s):  
Xiaowei Fu ◽  
Zhimeng Liu ◽  
Bo Wu ◽  
Jiliang Wang ◽  
Jingxin Lei
Keyword(s):  
Thermal Properties ◽  
Energy Storage ◽  
Stearic Acid ◽  
Phase Change ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Phase Change Materials ◽  
Stable Phase ◽  
Impregnation Method

Sepiolite supported stearic acid composites for thermal energy storage

RSC Advances ◽  
2016 ◽  
Vol 6 (113) ◽  
pp. 112493-112501 ◽  
Author(s):  
Qiang Shen ◽  
Songyang Liu ◽  
Jing Ouyang ◽  
Huaming Yang
Keyword(s):  
Energy Storage ◽  
Stearic Acid ◽  
Phase Change ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Phase Change Materials ◽  
Vacuum Impregnation ◽  
Impregnation Method ◽  
Composite Phase Change Materials

In this paper, novel composite phase change materials (PCMs) were prepared by absorbing stearic acid (SA) into sepiolite (α-sepiolite, β-sepiolite) via a vacuum impregnation method.

scholarly journals Fabrication and Thermal Properties of Capric Acid/Calcinated Iron Tailings/Carbon Nanotubes Composite as Form-Stable Phase Change Materials for Thermal Energy Storage

Minerals ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 648
Author(s):  
Peng Liu ◽  
Xiaobin Gu ◽  
Zhikai Zhang ◽  
Jianping Shi ◽  
Jun Rao ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Thermal Properties ◽  
Energy Storage ◽  
Phase Change ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Mass Fraction ◽  
Capric Acid ◽  
Stable Phase ◽  
Impregnation Method

In this study, a novel form-stable phase change material (FSPCM) consisting of calcination iron tailings (CIT), capric acid (CA), and carbon nanotubes (CNT) was prepared using a simple direct melt impregnation method, and a series of tests have been carried out to investigate its properties. The leakage tests showed that CA can be retained in CIT with a mass fraction of about 20 wt.% without liquid leakage during the phase change process. Moreover, the morphology, chemical structure, and thermal properties of the fabricated composite samples were investigated. Scanning electron microscope (SEM) micrographs confirmed that CIT had a certain porous structure to confine CA in composites. According to the Fourier transformation infrared spectroscope (FTIR) results, the CA/CIT/CNT FSPCM had good chemical compatibility. The melting temperature and latent heat of CA/CIT/CNT by differential scanning calorimeter (DSC) were determined as 29.70 °C and 22.69 J/g, respectively, in which the mass fraction of CIT and CNT was about 80 wt.% and 5 wt.%, respectively. The thermal gravity analysis (TGA) revealed that the CA/CIT/CNT FSPCM showed excellent thermal stability above its working temperature. Furthermore, the melting and freezing time of CA/CIT/CNT FSPCM doped with 5 wt.% CNT reduced by 42.86% and 54.55% than those of pure CA, and it showed better heat transfer efficiency. Therefore, based on the above analyses, the prepared CA/CIT/CNT FSPCM is not only a promising candidate material for the application of thermal energy storage in buildings, but it also provides a new approach for recycling utilization of iron tailings.

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