氧燭中錳金屬粒徑對氯酸鈉熱解的催化作用

劉建國; 金龍哲; 高娜; 汪澍; 張浩

doi:10.13374/j.issn2095-9389.2017.08.004

氧燭中錳金屬粒徑對氯酸鈉熱解的催化作用

doi: 10.13374/j.issn2095-9389.2017.08.004

劉建國^1,2,3,
金龍哲^1,2,3,
高娜^1,2,3, ,,
汪澍^1,2,3,
張浩^1,2,3

1) 北京科技大學土木與資源工程學院, 北京 100083
2) 北京科技大學金屬礦山高效開采與安全教育部重點實驗室, 北京 100083
3) 北京科技大學礦井避險技術研究中心, 北京 100083

基金項目:

國家自然科學基金資助項目(51504017)

教育部博士點資助項目(20130006120020)

中國博士后資助基金資助項目(2014T70039,2013M540866)

中央高校基本科研業務經費資助項目(FRF-TP-15-043A3)

詳細信息

中圖分類號: X936
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出版歷程
- 收稿日期: 2017-03-09

Catalytic effect of Mn particle size on thermal decomposition of sodium chlorate in oxygen generators

LIU Jian-guo^1,2,3,
JIN Long-zhe^1,2,3,
GAO Na^{1,2,3
, ,},
WANG Shu^1,2,3,
ZHANG Hao^1,2,3

1) School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
2) Key Laboratory of Ministry of Education for High-Efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing 100083, China
3) Mine Emergency Technology Research Center, University of Science and Technology Beijing, Beijing 100083, China

摘要

摘要: 分別制備了兩組粒徑的Mn金屬燃料(平均粒徑分別為18.73和5.24 μm),利用激光粒度分析儀測試了其粒徑分布,掃描電鏡分析了表面形貌,能譜儀確定了所含元素.對NaClO₃,NaClO₃與Co₃O₄,NaClO₃、Co₃O₄與Mn的混合物分別進行了熱重與示差掃描量熱聯合分析實驗(TGA-DSC),通過對比各混合物熱解起始溫度及其他特征溫度,探究了Mn金屬粒徑對NaClO₃熱解的催化強度與熱解穩定性的影響.研究結果表明:Co₃O₄雖對NaClO₃熱解具有催化性,熱解開始溫度(T_o)由512.3℃下降為333.0℃,但其可導致NaClO₃熱解的不穩定,熱解階梯由1個變為3個;Mn金屬燃料對NaClO₃中間產物具有明顯的催化性,且隨著粒徑減小,催化強度逐漸增加,熱解終止溫度(T_f)由419.8℃下降為351.9℃,同時NaClO₃熱解階梯減少,熱解溫度區間變窄(由180.6℃減小為19.4℃),熱解更加穩定.
- 氧燭 /
- 金屬燃料 /
- 粒徑 /
- 氯酸鈉 /
- 熱分解
Abstract: Two groups of Mn metal fuels with different particle-size distributions were prepared with median diameters of 18.73 and 5.24 μm. The particle-size distribution was measured by a laser particle-size analyzer, the surface morphology was analyzed via scanning electron microscopy (SEM), and energy dispersive spectrometry (EDS) determined the contained elements. For the NaClO₃, the NaClO₃ and Co₃O₄ as well as NaClO₃, Co₃O₄, and Mn mixtures were subjected to TGA-DSC combined thermogravimetric analysis. The effects of the Mn metal fuel particle size on the catalytic effect and pyrolysis stability of NaClO₃ were investigated by comparing the pyrolysis onset/final temperature and other characteristics. The results show that although Co₃O₄ has a significant catalytic effect on the pyrolysis of NaClO₃, e.g., the onset pyrolysis temperature decreases from 512.3 to 333.0℃, it can lead to instability in NaClO₃ pyrolysis, namely the pyrolysis steps from 1 to 3. The Mn metal fuel has a clear catalysis effect on the intermediate products of NaClO₃ pyrolysis. With the decrease in particle size, the catalytic effect gradually increases and the pyrolysis final temperature T_f decreases from 419.8 to 351.9℃. Meanwhile, the pyrolysis step of NaClO₃ decreases and the temperature range of pyrolysis decreases from 180.6 to 19.4℃, indicating that the pyrolysis process becomes more stable.
- oxygen generator /
- metal fuel /
- particle size /
- sodium chlorate /
- thermal decomposition

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參考文獻(22)

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