Hydration enthalpy for synthetic and cation exchanged A-type zeolites with special reference to zeolite heat pump media

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著者

    • KASAI Toshihiro
    • Department of Advanced Materials Science and Engineering, Graduate School of Engineering, Yamaguchi University
    • MAEDA Hiroshi
    • Department of Advanced Materials Science and Engineering, Graduate School of Engineering, Yamaguchi University
    • MATSUI Kousuke
    • Department of Advanced Materials Science and Engineering, Graduate School of Engineering, Yamaguchi University
    • KURNIA Dewi Fatimah
    • Research and Development Centre for Geotechnology Indonesian Institute of Sciences (LIPI)
    • NAKAYAMA Noriaki
    • Department of Advanced Materials Science and Engineering, Faculty of Engineering, Yamaguchi University
    • MIZOTA Tadato
    • Department of Advanced Materials Science and Engineering, Faculty of Engineering, Yamaguchi University

抄録

Na-A type zeolite has been synthesized from the waste solution with the red mud exhausted from the Bayer process. The heats of water-vapor absorption of the Na–A and cation exchanged zeolites were measured by means of an adiabatic water-vapor absorption calorimeter which had been devised for investigating heat pump effect of zeolites. The integrated hydration enthalpy of A-zeolite is in the same order as those of mordenite and clinoptilolite. However, A-zeolite shows twice the total heat amount obtainable from unit weight samples of a natural zeolite, because natural zeolites contain impurity phases, and their dehydration amount around 100°C is much smaller. Mg-exchanged A-zeolite dehydrated at 100°C showed the largest amount of hydration enthalpy of 65.1kJ/mol, and a weight loss on dehydration of 14.7%. The Mg-A-zeolite will be the most efficient heat pump media of all zeolites dehydrated at 100°C in the present work.

収録刊行物

  • Mineralogical journal

    Mineralogical journal 17(4), 170-180, 1994-10-01

    Japan Association of Mineralogical Sciences

参考文献:  10件中 1-10件 を表示

被引用文献:  13件中 1-13件 を表示

各種コード

  • NII論文ID(NAID)
    10008771077
  • NII書誌ID(NCID)
    AA00739590
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    05442540
  • データ提供元
    CJP書誌  CJP引用  J-STAGE 
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