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首页> 外文期刊>Energy & fuels >Investigation of Chemical Looping Combustion by Solid Fuels. 2. Redox Reaction Kinetics and Product Characterization with Coal, Biomass, and Solid Waste as Solid Fuels and CuO as an Oxygen Carrier
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Investigation of Chemical Looping Combustion by Solid Fuels. 2. Redox Reaction Kinetics and Product Characterization with Coal, Biomass, and Solid Waste as Solid Fuels and CuO as an Oxygen Carrier

机译：固体燃料化学循环燃烧的研究。 2.以煤，生物质和固体废物为固体燃料，以CuO为氧载体的氧化还原反应动力学和产物表征

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摘要

This paper is the second in a series of two on the investigation of the chemical looping combustion (CLC) of solid fuels. The first paper put forward the concept of the CLC of solid fuels using a circulating fluidized bed as a reactor and Cu—CuO as the oxygen carrier, which was based on an analysis of oxygen transfer capability, reaction enthalpy, and chemical equilibrium. In this second paper, we report the results of the evaluation of the reduction of CuO reduced by solid fuels such as coal and some other "opportunity" solid fuels. Tests on the reduction of CuO by the selected solid fuels were conducted using simultaneous differential scanning calorimetry and thermogravimetric analysis, which simulates a microreactor. An attached mass spectrometer (MS) was used for the characterization of evolved gaseous products. The X-ray diffractometer (XRD) and scanning electron microscope (SEM) were used for the characterization of the solid residues. Results strongly supported the feasibility of CuO reduction by selected solid fuels. CuO can be fully converted into Cu in a reduction process, either in a direct path by solid fuels, which was verified by MS analysis under a N_2 atmosphere, or in an indirect path by pyrolysis and gasification products of solid fuels in the reducer. No Cu_2O exists in reducing atmospheres, which was characterized by an XRD analysis and mass balance calculations. No carbon deposit was found on the surface of the reduced Cu, which was characterized by SEM analysis. CuO reduction by solid fuels can start at temperatures as low as approximately 500℃. Tests indicated that the solid fuels with higher reactivity (higher volatile matter) would be desirable for the development of the chemical looping combustion process of solid fuels, such as sub-bituminous Powder River Basin coal and solid waste and biomass.
机译：本文是有关固体燃料化学回路燃烧（CLC）研究的系列文章中的第二篇。第一篇论文基于对氧的传递能力，反应焓和化学平衡的分析，提出了以循环流化床为反应器，以Cu-CuO为氧载体的固体燃料的CLC概念。在第二篇论文中，我们报告了对诸如煤和其他“机会”固体燃料之类的固体燃料所减少的CuO还原度的评估结果。使用同时的差示扫描量热法和热重分析（模拟微反应器）进行了通过所选固体燃料还原CuO的测试。使用附加的质谱仪（MS）表征析出的气态产物。 X射线衍射仪（XRD）和扫描电子显微镜（SEM）用于表征固体残留物。结果有力地证明了通过选择的固体燃料减少CuO的可行性。在还原过程中，CuO可以完全通过固态燃料直接转化为Cu，这可以在N_2气氛下通过MS分析进行验证，也可以通过还原剂中固体燃料的热解和气化产物通过间接途径间接转化为Cu。通过XRD分析和质量平衡计算来表征还原性气氛中不存在Cu_2O。在还原的Cu的表面上未发现碳沉积，这通过SEM分析来表征。固体燃料对CuO的还原可以在低至约500℃的温度下开始。测试表明，具有较高反应活性（较高挥发性物质）的固体燃料对于发展固体燃料的化学循环燃烧过程将是理想的，例如亚烟煤粉河盆地煤以及固体废物和生物质。

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  • 来源
    《Energy & fuels》 |2006年第5期|p.1845-1854|共10页
  • 作者

    Yan Cao; Bianca Casenas; Wei-Ping Pan;

  • 作者单位

    Institute for Combustion Science and Environmental Technology, Western Kentucky University, Bowling Green, Kentucky 42101;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 TK-;
  • 关键词

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