Preparation and thermal energy storage properties of paraffin/calcined diatomite composites as form-stable phase change materials

Sun, Zhiming, Zhang, Yuzhong, Zheng, Shuilin, Park, Yuri, & Frost, Ray L. (2013) Preparation and thermal energy storage properties of paraffin/calcined diatomite composites as form-stable phase change materials. Thermochimica Acta, 558, pp. 16-21.

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A composite paraffin-based phase change material (PCM) was prepared by blending composite paraffin and calcined diatomite through the fusion adsorption method. In this study, raw diatomite was purified by thermal treatment in order to improve the adsorption capacity of diatomite, which acted as a carrier material to prepare shape-stabilized PCMs. Two forms of paraffin (paraffin waxes and liquid paraffin) with different melting points were blended together by the fusion method, and the optimum mixed proportion with a suitable phase-transition temperature was obtained through differential scanning calorimetry (DSC) analysis. Then the prepared composite paraffin was adsorbed in calcined diatomite. The prepared paraffin/calcined diatomite composites were characterized by the scanning electron microscope (SEM) and Fourier transformation infrared (FT-IR) analysis techniques. Thermal energy storage properties of the composite PCMs were determined by DSC method. DSC results showed that there was an optimum adsorption ratio between composite paraffin and calcined diatomite and the phase-transition temperature and the latent heat of the composite PCMs were 33.04 ◦C and 89.54 J/g, respectively. Thermal cycling test of composite PCMs showed that the prepared material is thermally reliable and chemically stable. The obtained paraffin/calcined diatomite composites have proper latent heat and melting temperatures, and show practical significance and good potential application value.

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47 citations in Web of Science®
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ID Code: 58890
Item Type: Journal Article
Refereed: Yes
Keywords: DSC, Phase change materials, Thermal Properties, Paraffin, Calcined diatomite
DOI: 10.1016/j.tca.2013.02.005
ISSN: 0040-6031
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: © 2013 Elsevier
Deposited On: 04 Apr 2013 23:06
Last Modified: 27 Apr 2013 09:24

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