Synthesis and characterization of PEG/ZSM-5 composite phase change materials for latent heat storage

Li, Chaoen; Yu, Hang; Yuan, Songliu; Zhao, Mingjie

doi:10.1016/j.renene.2017.12.089

Cited by 73 publications

(32 citation statements)

References 42 publications

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“…As a result, every main peak of ASB and PEG appeared in the spectrum of CPCM3 without other new peaks, and there was no obvious shift of these main peaks as well. It was confirmed that the interaction between PEG and ASB occured through a single physical process, including the van der waal force, capillary and surface tension forces rather than chemical reactions [ 41 , 42 ], which was in accordance with the hypothesis suggested in the discussion of the XRD patterns.…”

Section: Resultssupporting

confidence: 81%

“…For PEG, stretching vibrations of the –CH 2 functional groups were observed at 962 cm −1 and 2889 cm −1 [ 38 ]. Moreover, C–O and –OH groups could be found at 1109 cm −1 and 3440 cm −1 [ 41 ], respectively. As a result, every main peak of ASB and PEG appeared in the spectrum of CPCM3 without other new peaks, and there was no obvious shift of these main peaks as well.…”

Section: Resultsmentioning

confidence: 99%

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Cost-Effective Biochar Produced from Agricultural Residues and Its Application for Preparation of High Performance Form-Stable Phase Change Material via Simple Method

Chen

Cui

Ding

et al. 2018

IJMS

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A new form-stable composite phase change material (PEG/ASB) composed of almond shell biochar (ASB) and polyethylene glycol (PEG) was produced via a simple and easy vacuum impregnation method. The supporting material ASB, which was cost effective, environmentally friendly, renewable and rich in appropriate pore structures, was produced from agricultural residues of almond shells by a simple pyrolysis method, and it was firstly used as the matrix of PEG. Different analysis techniques were applied to investigate the characteristics of PEG/ASB, including structural and thermal properties, and the interaction mechanism between ASB and PEG was studied. The thermogravimetric analysis (TGA) and thermal cycle tests demonstrated that PEG/ASB possessed favorable thermal stability. The differential scanning calorimetry (DSC) curves demonstrated that the capacities for latent heat storage of PEG/ASB were enhanced with increasing PEG weight percentage. Additionally, PEG/ASB had an excellent thermal conductivity of 0.402 W/mK, which was approximately 1.6 times higher than that of the pure PEG due to the addition of ASB. All the study results indicated that PEG/ASB had favorable phase change properties, which could be used for thermal energy storage.

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Section: Resultssupporting

confidence: 81%

Section: Resultsmentioning

confidence: 99%

Cost-Effective Biochar Produced from Agricultural Residues and Its Application for Preparation of High Performance Form-Stable Phase Change Material via Simple Method

Chen

Cui

Ding

et al. 2018

IJMS

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“…One can see that the pure eutectic K 2 CO 3 -Na 2 CO 3 salt has a phase change enthalpy of 250.4 J/g at 709.7 • C. It can be found that the measured enthalpy of the composite (Sample S8) is lower than the theoretical enthalpy (136.47 kJ) which could be calculated by the weight percentage of the salt. Guo et al [41] and Li [42] have both studied the experimental latent heat of the composite PCM compared to the theoretical values. They found that the structure of the additives could affect the crystal properties or the phase change process of the PCM.…”

Section: Chemical Compatibility Between Different Componentsmentioning

confidence: 99%

A Form Stable Composite Phase Change Material for Thermal Energy Storage Applications over 700 °C

Zhu

Jiang

et al. 2019

Applied Sciences

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Thermal energy storage (TES) is a highly effective approach for mitigating the intermittency and fluctuation of renewable energy sources and reducing industrial waste heat. We report here recent research on the use of composite phase change materials (PCM) for applications over 700 °C. For such a category of material, chemical incompatibility and low thermal conductivity are often among the main challenges. Our aims are to address these challenges through the formulation of form-stable composite PCMs and to understand their thermophysical properties. The eutectic K2CO3-Na2CO3 salt was used as a PCM with MgO as a form stabilizer. We found that such a formulation could maintain shape stability with up to 60 wt.% PCM. With a melting point of ~710.1 °C and an energy density as high as 431.2 J/g over a temperature range between 550 °C and 750 °C, the composite PCM was shown to be thermally stable up to 885 °C. An addition of 10 wt.% SiC enhanced the overall thermal conductivity from 1.94 W·m−1 K−1 to 2.28 W·m−1 K−1, giving an enhancement of 17.53%. Analyses of thermal cycling data also showed a high extent of chemical compatibility among the ingredients of the composite PCM.

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“…Among those various types of organic PCMs, polyethylene glycol (PEG) is a potential candidate owing to its excellent properties, such as appropriate phase transition temperature, large latent heat value, low volatilization, small volume change for solid‐liquid phase change, no phase segregation, good thermal stability and reliability, and good chemical stability. However, three main problems for PEG exist to be used in actual applications: low thermal conductivity, poor wettability with some supporting materials, and easy leakage after the phase change from solid to liquid . For solving these problems, shape‐stabilized composite phase change material (ss‐CPCM) comprised of working materials (organic solid‐liquid PCM) and supporting material (normally inorganic materials) was explored .…”

Section: Introductionmentioning

confidence: 99%

“…However, three main problems for PEG exist to be used in actual applications: low thermal conductivity, poor wettability with some supporting materials, and easy leakage after the phase change from solid to liquid. [13][14][15] For solving these problems, shape-stabilized composite phase change material (ss-CPCM) comprised of working materials (organic solid-liquid PCM) and supporting material (normally inorganic materials) was explored. 16,17 Compared with those organic working substances, inorganic materials have a relative better thermal conductivity, which indicates that the supporting inorganic materials can be used for the matrix of organic PCMs to raise the thermal properties of CPCMs.…”

Section: Introductionmentioning

confidence: 99%

Preparation and thermal properties of shape‐stabilized polyethylene glycol/mesoporous silica composite phase change materials for thermal energy storage

et al. 2019

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Mesoporous silica (MS) was prepared through a simple self‐assembly procedure under alkaline condition with tetraethyl orthosilicate (TEOS) as SiO2 precursor and cetyltrimethyl ammonium bromide (CTAB) as the template. A series of shape‐stabilized composite phase change materials (ss‐CPCMs), using polyethylene glycol 6000 (PEG6000) as the PCM and MS as the matrix with different mass percentage of PEG6000 loadings, was prepared through a vacuum impregnation method. N2 adsorption‐desorption analyzer measurement showed the specific surface area and average pore size of the as‐prepared porous silica were determined to be 760 m2/g and about 3 nm, respectively. Differential scanning calorimetry (DSC) measurements indicated that the melting peak temperatures and latent heats of melting of the composites are varied from 52.3°C to 62.6°C and 32.9 to 186.4 J/g (PEG6000 mass fractions: 0%‐80%), which was proportional to PEG6000 content. Fourier‐transform infrared (FT‐IR) spectroscopy results implied that only the physical interaction existed between the PEG6000 and SiO2 matrix. The shape‐stability measurements suggested the composite with the 70% mass loading of PEG6000 can still maintained the original shape and no leakage were observed above the much higher melting temperature of PEG6000 (105°C). Thermal cycling test showed that the ss‐CPCM had good thermal reliability and chemical stability although it was experienced 500 melting and cooling cycles. Moreover, the thermal decomposition temperature of the composites (393.2°C) was much larger than the melting temperature of pure PEG6000 (62.6°C), which indicated that composite presented excellent thermal stabilities and was suitable for thermal energy storage applications.

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Synthesis and characterization of PEG/ZSM-5 composite phase change materials for latent heat storage

Cited by 73 publications

References 42 publications

Cost-Effective Biochar Produced from Agricultural Residues and Its Application for Preparation of High Performance Form-Stable Phase Change Material via Simple Method

Cost-Effective Biochar Produced from Agricultural Residues and Its Application for Preparation of High Performance Form-Stable Phase Change Material via Simple Method

A Form Stable Composite Phase Change Material for Thermal Energy Storage Applications over 700 °C

Preparation and thermal properties of shape‐stabilized polyethylene glycol/mesoporous silica composite phase change materials for thermal energy storage

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