Effect of Liquid Height on Flow Characteristics in Bubble Column Using Highly Viscous Liquid

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The flow characteristics in the bubble column, in the case of highly viscous liquid, were experimentally examined. Carboxymethyl cellulose (CMC) aqueous solution was used as the liquid phase, and the liquid height, column diameter, gas velocity and CMC concentration were changed. The flow pattern was observed, and the gas holdup and volumetric mass transfer coefficient were measured.<BR>When a large bubble, or slug, flowed out of the liquid surface, the liquid surface was violently disturbed and small bubbles were entrained into the liquid. The entrained small bubbles had a significant influence on the flow characteristics. The gas holdup and volumetric mass transfer coefficient decreased with increasing liquid height and were unchanged beyond a certain liquid height. The critical aspect ratio of the column was about 8, independently of the column diameter, gas velocity and liquid viscosity. Experimental equations on the volumetric coefficient were obtained.

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  • Journal of chemical engineering of Japan

    Journal of chemical engineering of Japan 36(5), 523-529, 2003-05-01

    公益社団法人 化学工学会

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各種コード

  • NII論文ID(NAID)
    10013413132
  • NII書誌ID(NCID)
    AA00709658
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00219592
  • NDL 記事登録ID
    6534451
  • NDL 雑誌分類
    ZP1(科学技術--化学・化学工業)
  • NDL 請求記号
    Z53-R395
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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