フッ化テトラn-ブチルアンモニウムクラスレート水和物の融解特性 Melting Characteristics of Tetra n-Butyl Ammonium Fluoride Clathrate Hydrate

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Clathrate hydrate of tetra n-butyl ammonium fluoride (TBAF) is a promising thermal storage material, because this clathrate can be produced from TBAF solutions at temperatures between 0 and 27 °C under the atmospheric pressure. In this study, melting characteristics of the TBAF clathrate hydrate were investigated by using a differential scanning calorimeter (DSC). Four types of endothermic peaks were observed in DSC curves during melting, when the TBAF clathrate was produced from TBAF solutions at initial concentrations between 10 and 55 wt%. One of these peaks cannot be explained by the existing phase diagram. This endothermic peak suggests an unknown crystal structure of TBAF clathrate that coexists stably with TBAF solutions at a concentration higher than 50 wt%. X-ray diffraction data of TBAF clathrate also supported the existence of this unknown crystal structure. Enthalpy changes corresponding to the four types of endothermic peaks in DSC curves were evaluated. The results showed that the TBAF clathrate can be used as a thermal storage material at 29 °C, which is nearly equal to the congruent melting point of TBAF clathrate.

収録刊行物

  • Thermal science and engineering  

    Thermal science and engineering 16(1), 41-48, 2008-01-01 

    The Heat Transfer Society of Japan

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各種コード

  • NII論文ID(NAID)
    10021063879
  • NII書誌ID(NCID)
    AA11358679
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09189963
  • NDL 記事登録ID
    9395860
  • NDL 雑誌分類
    ZM5(科学技術--科学技術一般--工学・工業)
  • NDL 請求記号
    Z54-J404
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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