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首页> 外文期刊>Metallurgical and Materials Transactions B >Investigation of a Two-Stage Aqueous Reactor Design for Carbon Dioxide Sequestration Using Steelmaking Slag
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Investigation of a Two-Stage Aqueous Reactor Design for Carbon Dioxide Sequestration Using Steelmaking Slag

机译：用炼钢炉渣固存二氧化碳的两阶段水反应器设计研究

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摘要

Hydrous carbonate sequestration of carbon dioxide using steelmaking slag was studied using a METSIM process model to analyze experimental data and estimate the reactor operating results. Several scenarios of a two-stage system with water/slag contact in reactor 1 and leachate/carbon dioxide contact in reactor 2 were investigated. These scenarios included batch vs continuous processing and fresh water input vs water recirculation. The METSIM leaching and carbonation models were verified with results obtained from previous slag sequestration experiments. Fresh water additions to reactor 1 allowed the highest leaching efficiency and resulted in excellent carbonation in reactor 2, but a continuous system has a high water demand. Recirculation of the spent leachate minimizes the fresh water addition required, but inhibits the leaching process by producing a calcium carbonate product layer on the slag particles in reactor 1. Increasing the slag surface area, slag/solution ratio, or reactor residence time partially overcomes product layer “blinding.” Optimal residence times were defined for different process parameters and slag particle sizes.
机译：利用METSIM工艺模型研究了利用炼钢炉渣固存二氧化碳的碳酸水合二氧化碳，以分析实验数据并估算反应堆的运行结果。研究了反应器1中水/渣接触和反应器2中渗滤液/二氧化碳接触的两阶段系统的几种情况。这些方案包括分批处理与连续处理，淡水输入与水再循环。 METSIM的浸出和碳化模型已从先前的固渣实验中得到了验证。向反应器1中添加淡水可实现最高的浸出效率，并在反应器2中产生出色的碳酸化作用，但连续系统的需水量很高。废渗滤液的再循环可最大程度地减少所需的淡水添加量，但可通过在反应器1的炉渣颗粒上生成碳酸钙产品层来抑制浸出过程。增加炉渣的表面积，炉渣/溶液比或反应器停留时间会部分克服产品层“致盲”。针对不同的工艺参数和炉渣粒度定义了最佳停留时间。

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  • 来源
    《Metallurgical and Materials Transactions B》 |2008年第3期|484-492|共9页
  • 作者

    S.N. Lekakh; D.G.C. Robertson; C.H. Rawlins; V.L. Richards; K.D. Peaslee;

  • 作者单位

    Department of Materials Science and Engineering Missouri University of Science and Technology Rolla MO 65409-0330 USA;

    Department of Materials Science and Engineering Missouri University of Science and Technology Rolla MO 65409-0330 USA;

    Department of Materials Science and Engineering Missouri University of Science and Technology Rolla MO 65409-0330 USA;

    Department of Materials Science and Engineering Missouri University of Science and Technology Rolla MO 65409-0330 USA;

    Department of Materials Science and Engineering Missouri University of Science and Technology Rolla MO 65409-0330 USA;

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