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Enhancing ignition and combustion characteristics of micron-sized aluminum powder in steam by adding sodium fluoride

机译：加入氟化钠加强微米尺寸铝粉的点火和燃烧特性

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摘要

Micron-sized aluminum powder exhibits difficulties in ignition and burnout in steam. To overcome these problems, we added various sodium fluoride contents to micron-sized aluminum powder in steam at 800, 900, and 1000 degrees C to assess their effects on ignition and combustion performances. The ignition delay times, ignition temperatures, and combustion characteristics of all samples were measured primarily using two high-temperature tube resistance electric furnace systems. The experiments showed that adding sodium fluoride to micron-sized aluminum powder decreases its ignition delay time and temperature. Moreover, the ignition delay time and temperature of aluminum powder with addition of sodium fluoride decreases considerably when the temperature increases. For this study, the components and morphology of solid combustion products were obtained using X-ray diffraction and scanning electron microscopy. The combustion efficiency was measured volumetrically using a specially designed apparatus. The obtained combustion efficiency was found to increase with the amount of sodium fluoride added and increase in the temperature. The relationship among the parameters related to combustion characteristics and product characterization was examined in detail to reveal the combustion mechanism. (C) 2019 Published by Elsevier Inc. on behalf of The Combustion Institute.
机译：微米尺寸的铝粉在蒸汽中点火和燃尽件难以。为了克服这些问题，我们将各种氟化钠含量添加到800,900和1000摄氏度的蒸汽中为微米尺寸的铝粉，以评估它们对点火和燃烧性能的影响。所有样品的点火延迟时间，点火温度和燃烧特性主要是使用两个高温管电阻电炉系统测量。实验表明，向微米尺寸的铝粉末中加入氟化钠降低其点火延迟时间和温度。另外，当温度升高时，加入氟化钠的铝粉末的点火延迟时间和温度随之而降低。对于该研究，使用X射线衍射和扫描电子显微镜获得固体燃烧产物的组分和形态。使用专门设计的装置在体内测量燃烧效率。发现所获得的燃烧效率随氟化钠的增加和温度的增加而增加。详细研究了与燃烧特性和产品表征相关的参数之间的关系以揭示燃烧机制。 （c）2019年由elsevier Inc.代表燃烧学院发布。

著录项

  • 来源
    《Combustion and Flame》 |2019年第7期|68-79|共12页
  • 作者

    Zhu Baozhong; Li Fan; Sun Yunlan; Wu Yuxin; Shi Wei; Han Weikang; Wang Qichang; Wang Qi;

  • 作者单位

    Changzhou Univ Sch Petr Engn Changzhou 213164 Jiangsu Peoples R China|Anhui Univ Technol Sch Energy & Environm Maanshan 243002 Anhui Peoples R China;

    Anhui Univ Technol Sch Energy & Environm Maanshan 243002 Anhui Peoples R China|Chinese Acad Sci Guangzhou Inst Energy Convers Guangzhou 510640 Guangdong Peoples R China;

    Changzhou Univ Sch Petr Engn Changzhou 213164 Jiangsu Peoples R China|Anhui Univ Technol Sch Energy & Environm Maanshan 243002 Anhui Peoples R China;

    Anhui Univ Technol Sch Energy & Environm Maanshan 243002 Anhui Peoples R China;

    Anhui Univ Technol Sch Energy & Environm Maanshan 243002 Anhui Peoples R China;

    Anhui Univ Technol Sch Energy & Environm Maanshan 243002 Anhui Peoples R China;

    Anhui Univ Technol Sch Energy & Environm Maanshan 243002 Anhui Peoples R China;

    Anhui Univ Technol Sch Energy & Environm Maanshan 243002 Anhui Peoples R China;

  • 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
  • 关键词

    Combustion characteristics; Micron-sized aluminum; Steam; Sodium fluoride;

    机译：燃烧特性;微米型铝;蒸汽;氟化钠;

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