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首页> 外文期刊>Journal of Energy Storage >Characterization of a porous mineral as a promising support for shape-stabilized phase change materials
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Characterization of a porous mineral as a promising support for shape-stabilized phase change materials

机译：表征多孔矿物作为形状稳定相变材料的有前途的支持

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摘要

Several characterization techniques were used to identify and quantify the mineralogical phases of a Colombian mineral that could be used as a suitable porous support for shape-stabilized phase change materials (SS-PCMs). The mineral was calcined in a laboratory box furnace at 600 degrees C, 900 degrees C and 1100 degrees C. The phase evolution and microstructure were investigated by X-ray fluorescence (XRF), thermogravimetric analysis (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Through the Rietveld refinement method the phases were quantified. The results showed that the mineral was composed of 19.75% kaolinite, 11.88% quartz, 10.75% illite, and 40.00% diatomite. Preliminary SS-PCMs were produced through vacuum assisted impregnation. Lauric-myristic acid binary eutectic was prepared and then incorporated at 25 wt.% (SS-LAMA25), 35 wt.% (SS-LAMA35), and 40 wt.% (SS-LAMA40) into the raw mineral. The leakage obtained for the composites was between 0.1% and 4.9%. Differential scanning calorimetry (DSC) showed a latent heat of fusion of 29.63 kJ/kg, 51.57 kJ/kg and 56.59 kJ/kg, and phase change temperatures of 35.39 degrees C, 36.35 degrees C and 36.17 degrees C, for the SS-LAMA25, SS-LAMA35 and SS-LAMA40, respectively.
机译：几种表征技术用于鉴定和量化哥伦比亚矿物的矿物学相，可以用作形状稳定的相变材料（SS-PCM）的合适多孔载体。矿物在实验室箱式炉中分别在600摄氏度，900摄氏度和1100摄氏度下煅烧。通过X射线荧光（XRF），热重分析（TGA），X射线衍射（XRD）研究了相演化和微观结构），扫描电子显微镜（SEM）和透射电子显微镜（TEM）。通过Rietveld精炼方法，可以对相进行定量。结果表明，该矿物由19.75％的高岭石，11.88％的石英，10.75％的伊利石和40.00％的硅藻土组成。通过真空辅助浸渍生产了初步的SS-PCM。制备月桂酸肉豆蔻酸二元共晶物，然后将其以25wt。％（SS-LAMA25），35wt。％（SS-LAMA35）和40wt。％（SS-LAMA40）掺入原料矿物中。复合材料的泄漏率为0.1％至4.9％。差示扫描量热法（DSC）显示SS-LAMA25的熔融潜热分别为29.63 kJ / kg，51.57 kJ / kg和56.59 kJ / kg，相变温度分别为35.39 C，36.35 C和36.17C。 ，SS-LAMA35和SS-LAMA40。

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