Leaching Kinetics of Magnesite in Citric Acid Solutions

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The solubility of magnesite ore in citric acid, an environmentally friend and natural reagent, was investigated. The effects of reaction temperature, particle size and acid concentration were examined. The leaching rate increased with decreasing particle size and with increasing temperature. The dissolution in terms of acid concentration increased initially and then fell with increasing concentration. By testing shrinking core models for fluid-solid systems, it was observed that the dissolution of magnesite was controlled by chemical reaction. The following semi-empirical model was developed: 1 – (1 – <I>x</I>)<SUP>1/3</SUP> = 6.4 × 10<SUP>7</SUP>(<I>D</I>)<SUP>–017</SUP>(<I>C</I>)<SUP>0.11</SUP><I>e</I><SUP>–61.35/<I>RT</I></SUP><I>t</I>, where <I>D</I> is the particle size, <I>C</I> the acid concentration, <I>T</I> the reaction temperature and <I>t</I> the reaction time. The activation energy of the process was 61.35 kJ·mol<SUP>–1</SUP>.

収録刊行物

  • Journal of chemical engineering of Japan

    Journal of chemical engineering of Japan 36(6), 683-688, 2003-06-01

    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)
    10013413507
  • 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
    6577545
  • 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  CJP引用  NDL  J-STAGE 
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