石炭灰フライアッシュからの potassium-chabazite の生成挙動 Formation Behavior of Potassium-Chabazite from Coal Fly Ash

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The objective of this study is to investigate the effect of various reaction conditions on zeolitization from coal fly ash. Hydrothermal syntheses of zeolite were carried out by using KOH as an alkali source. Various physical properties such as surface texture, identification of crystalline materials, cation exchange capacity and so on were evaluated for the obtained zeolites. From these results, the reaction mechanism of zeolite was considered in the hydrothermal synthesis by KOH as an alkali source.<BR>Potassium-chabazite(K-CHA), which is one of the zeoltic materials, is obtained in 2.0 mol / dm<sup>3</sup> KOH solution at 393 K of reaction temperature. The production of K-CHA is confirmed to begin at 5h of reaction time, and then the crystallization degree of K-CHA becomes constant at about 10 h. The value of cation exchange capacity(CEC) of the product is about 250 meq / 100 g at 50h of reaction time, at which crystallization degree reaches an saturation state. The reaction rate of K-CHA increases with an increase in KOH concentration, and the CEC in 4.0 mol / dm<sup>3</sup> KOH solution at 50 h of reaction time becomes large up to 280 meq / 100 g. The layer of K-CHA crystal in the product is about 80 % as a volume standard.

収録刊行物

  • 資源と素材 : 資源・素材学会誌 : journal of the Mining and Materials Processing Institute of Japan

    資源と素材 : 資源・素材学会誌 : journal of the Mining and Materials Processing Institute of Japan 118(5), 419-424, 2002-06-25

    一般社団法人 資源・素材学会

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各種コード

  • NII論文ID(NAID)
    10008852323
  • NII書誌ID(NCID)
    AN10062646
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09161740
  • NDL 記事登録ID
    6191489
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-315
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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