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过程工程学报 ›› 2015, Vol. 15 ›› Issue (4): 614-619.DOI: 10.12034/j.issn.1009-606X.215159

• 过程与工艺 • 上一篇    下一篇

添加KNO3对Al与CO2热反应特性及点火燃烧性能的影响

孙蓉 朱宝忠 孙运兰 王婷 王双   

  1. 安徽工业大学能源与环境学院 安徽工业大学冶金与资源学院 安徽工业大学能源与环境学院 安徽工业大学能源与环境学院 安徽工业大学能源与环境学院
  • 收稿日期:2015-03-30 修回日期:2015-07-02 出版日期:2015-08-20 发布日期:2015-08-20
  • 通讯作者: 朱宝忠

Effects of KNO3 on Thermal Reaction and Ignition Combustion Characteristics of Al with CO2

SUN Rong ZHU Bao-zhong SUN Yun-lan WANG Ting WANG Shuang   

  1. Anhui University of Technology School of Metallurgy & Resource, Anhui University of Technology School of Energy and Environment, Anhui University of Technology School of Energy and Environment, Anhui University of Technology School of Energy and Environment, Anhui University of Technology
  • Received:2015-03-30 Revised:2015-07-02 Online:2015-08-20 Published:2015-08-20
  • Contact: ZHU Bao-zhong

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摘要： 采用热分析仪和可视化管式炉研究了添加KNO3对纳米铝粉在CO2气氛中的热反应特性和点火燃烧特性的影响. 结果表明，随KNO3添加量增加，纳米铝粉着火点降低. 添加1%和5%(w) KNO3可分别使着火点温度降低18.3和37.9℃，并使燃烧特性指数增加，但增加程度逐渐降低. 添加KNO3可加速纳米铝粉在CO2气氛中的点火过程，使铝粉氧化反应更剧烈. 添加KNO3后纳米铝粉的燃烧产物中除有大量a-Al2O3与少量单质Al外，还存在部分g-Al2O3.

关键词: 纳米铝粉, CO2, KNO3, 热反应, 点火燃烧

Abstract: The effects of KNO3 on the thermal reaction characteristics and ignition combustion phenomenon of nano-aluminum powder in CO2 were studied by thermal analysis techniques and visualization tube furnace. The results show that ignition temperature of nano-aluminum powder decreases with the increase of KNO3 concentration, the ignition temperature of nano-aluminum powder with 1%(w) and 5%(w) KNO3 can be reduced by 18.3 and 37.9℃, respectively, and the combustion characteristic index of nano-aluminum powder increases, but the incremental rate gradually declines. Ignition of nano-aluminum powder with addition of KNO3 can be accelerated, so the oxidation of aluminum powder is more violent. Furthermore, the combustion products of nano-aluminum powder with KNO3 not only contain a large amount of a-Al2O3 and a small amount of activated Al, but also have g-Al2O3.

Key words: nano-aluminum powder, CO2, KNO3, thermal reaction, ignition combustion

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