Leaching of Nickel from a Hydrodesulphurization Spent Catalyst with Ammonium Sulfate

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Leaching of nickel from a hydrodesulphurization spent catalyst generated from the sulfur removal process of petroleum refineries was investigated using ammonium sulfate ((NH<SUB>4</SUB>)<SUB>2</SUB>SO<SUB>4</SUB>) solution. The spent catalyst used in the study was composed of vanadium and nickel as sulfides, supported in an alumina matrix. Experiments were carried out in a stirred batch reactor under the temperature range of 298–368 K and the (NH<SUB>4</SUB>)<SUB>2</SUB>SO<SUB>4</SUB> solution of 1.3–3.3 mol/dm<SUP>3</SUP>. As a result, about 94.0% of nickel was leached from the 2.6 mol/dm<SUP>3</SUP> (NH<SUB>4</SUB>)<SUB>2</SUB>SO<SUB>4</SUB> solution in 90 min at the temperature of 368 K. A shrinking core model was found to be useful in describing the rate of nickel leaching. The rate of nickel leaching is limited by ash layer diffusion. The nickel leaching is of the first order with respect to the (NH<SUB>4</SUB>)<SUB>2</SUB>SO<SUB>4</SUB> concentration and has an activation energy of 16.2 kJ/mol.

収録刊行物

  • Journal of chemical engineering of Japan

    Journal of chemical engineering of Japan 37(9), 1129-1134, 2004-09-01

    The Society of Chemical Engineers, Japan

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各種コード

  • NII論文ID(NAID)
    10013576819
  • 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
    7091373
  • 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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