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首页> 外文期刊>Fuel >Effect of coal ash on the performance of alloys in simulated oxy-fuel environments
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Effect of coal ash on the performance of alloys in simulated oxy-fuel environments

机译：粉煤灰对模拟含氧燃料环境中合金性能的影响

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摘要

Oxy-fuel combustion can increase efficiency and reduce pollution from coal power plants. To study material performance in an oxy-fuel environment, both Fe- and Ni-based alloys were exposed to simulated oxy-fuel environments at 750 ℃ for long terms up to 6300 h. The effects of ash and gas compositions (SO_2, CO_2, H_2O and O_2) on the performance of alloys were studied. Results from these tests are used to address the role of CO_2, steam, and ash in the long-term corrosion performance of alloys. Detailed results are presented on weight change, scale thickness, internal penetration, microstructural characteristics of corrosion products, and cracking of scales for the alloys. Oxide scales were studied by synchrotron nano-beam X-ray diffraction. An incubation period and a propagation period were observed for ash corrosion. Before incubation time, alloys gain weight. After incubation time, localized corrosion damages the protective scales, alloys lose weight and corrosion rates dramatically increase. Since the incubation time can be over 4000 h, long-term test results are more helpful in evaluating the alloy performance in an oxy-fuel combustion environment with ash than the results from a short-term test. The mechanism of ash corrosion is also discussed.
机译：含氧燃料燃烧可以提高效率，减少燃煤电厂的污染。为了研究在含氧燃料环境中的材料性能，Fe和Ni基合金都在750℃的模拟含氧燃料环境中暴露了长达6300 h的长时间。研究了灰分和气体成分（SO_2，CO_2，H_2O和O_2）对合金性能的影响。这些测试的结果用于解决CO_2，蒸汽和灰分在合金的长期腐蚀性能中的作用。给出了有关重量变化，氧化皮厚度，内部渗透性，腐蚀产物的微观结构特征以及合金氧化皮开裂的详细结果。通过同步加速器纳米束X射线衍射研究了氧化皮。观察到灰分腐蚀的潜伏期和繁殖期。在孵育之前，合金会变重。孵育一段时间后，局部腐蚀会损坏保护垢，合金重量减轻，腐蚀速率急剧增加。由于孵育时间可能超过4000小时，因此长期测试结果比短期测试结果更有助于评估带有灰分的含氧燃料燃烧环境中的合金性能。还讨论了灰烬腐蚀的机理。

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  • 来源
    《Fuel》 |2014年第ptaa期|133-145|共13页
  • 作者

    Z. Zeng; K. Natesan; Z. Cai; D.L. Rink;

  • 作者单位

    Nuclear Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, United States;

    Nuclear Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, United States;

    Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, United States;

    Nuclear Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Oxy-fuel; Ash corrosion; Alloys;

    机译：含氧燃料灰烬腐蚀;合金类;

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