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首页> 外文期刊>Clean air >COMPARISON OF THE PERFORMANCE OF IRON ORE AND SYNTHETIC IRON-BASED OXYGEN CARRIER FOR CHEMICAL LOOPING COMBUSTION OF COAL
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COMPARISON OF THE PERFORMANCE OF IRON ORE AND SYNTHETIC IRON-BASED OXYGEN CARRIER FOR CHEMICAL LOOPING COMBUSTION OF COAL

机译：铁矿石和合成铁基氧气载体对煤化学燃烧的性能比较

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摘要

Chemical-looping combustion (CLC) is a new technology for the efficient conversion of fuels with inherent separation of carbon dioxide. Direct CLC of coal has recently attracted the attention of researchers, but no work has been done using the YiMin coal with high reserves with a local natural material being used as an oxygen carrier. In the present paper, experiments on coal direct CLC was carried out in a batch fluidized bed using the YiMin coal and two kinds of materials, i.e., synthetic Fe _( 2 ) O _( 3 ) /MgAl _( 2 ) O _( 4 ) and natural iron ore as oxygen carriers. The performance of these two materials was compared and investigated. It was found that the reactivity of iron ore was comparable to that of Fe _( 2 ) O _( 3 ) /MgAl _( 2 ) O _( 4 ) . The carbon conversion when using iron ore (93.2%) as an oxygen carrier was similar to that when synthetic Fe _( 2 ) O _( 3 ) /MgAl _( 2 ) O _( 4 ) (93.8%) was used. An increase in the temperature of the reactor produced a higher relative concentration of CO _( 2 ) , while the relative concentrations of combustible gases decreased when iron ore was used as an oxygen carrier. The high stability of the two materials was confirmed during 10 cyclic operation processes at 950°C. Only minor changes appeared in the surface morphology of the samples after redox reactions, but no severe surface sintering was observed. The interactions between two oxygen carriers and ash were detected, and it was found that the coal ash had no significant effect on those two materials after redox processes. Therefore, the preliminary experiments and data analyses prove that it is suitable for direct CLC of YiMin coal with local natural iron ore as an oxygen carrier.
机译：化学循环燃烧（CLC）是一种新技术，可通过固有的二氧化碳分离有效地转化燃料。煤炭的直接CLC最近吸引了研究人员的注意，但是尚未完成使用具有高储量的YiMin煤炭以及将本地天然材料用作氧气载体的工作。本文采用益民煤和合成Fe _（2）O _（3）/ MgAl _（2）O _（两种）材料在间歇流化床中进行煤直接CLC实验。 4）和天然铁矿石作为氧气载体。比较并研究了这两种材料的性能。发现铁矿石的反应性与Fe _（2）O _（3）/ MgAl _（2）O _（4）相当。使用铁矿石（93.2％）作为氧载体时的碳转化率与使用合成的Fe _（2）O _（3）/ MgAl _（2）O _（4）（93.8％）时的碳转化率相似。当铁矿石用作氧气载体时，反应器温度的升高产生较高的CO_（2）相对浓度，而可燃气体的相对浓度降低。在950°C的10个循环操作过程中，证实了这两种材料的高稳定性。氧化还原反应后，样品的表面形貌仅出现微小变化，但未观察到严重的表面烧结。检测了两个氧载体与灰分之间的相互作用，发现粉煤灰对氧化还原处理后的两种材料没有显着影响。因此，初步实验和数据分析证明，该方法适用于以当地天然铁矿石为氧载体的益民煤直接CLC。

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  • 来源
    《Clean air》 |2018年第4期|157-174|共18页
  • 作者

    Ming Luo; Yang Yi; Jianjun Cai; Ke Liu; Chao Wang; Qian Wang;

  • 作者单位

    School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangshu;

    School of Energy and Power Engineering, Jiangsu University, Zhenjiang;

    Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi'an JiaotongUniversity, Xi'an;

    State Grid Shandong Electric Power Research Institute, Jinan;

    School of Energy and Power Engineering, Jiangsu University, Zhenjiang;

    School of Energy and Power Engineering, Jiangsu University, Zhenjiang;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    chemical looping; combustion; carbon capture; coal; iron ore;

    机译：化学循环;燃烧;碳捕集;煤;铁矿石;

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