工程科学学报，第39卷.第8期：1159-1165,2017年8月 Chinese Journal of Engineering,Vol.39,No.8:1159-1165,August 2017 D0L:10.13374/j.issn2095-9389.2017.08.004;htp:/journals..usth.edu.cn 氧烛中锰金属粒径对氯酸钠热解的催化作用 刘建国12,3》，金龙哲123)，高娜123)四，汪澍23)，张浩123) 1)北京科技大学土木与资源工程学院，北京1000832)北京科技大学金属矿山高效开采与安全教育部重点实验室，北京100083 3)北京科技大学矿井避险技术研究中心，北京100083 ☒通信作者，E-mail:13810278308@163.com 摘要分别制备了两组粒径的Mn金属燃料（平均粒径分别为18.73和5.24um),利用激光粒度分析仪测试了其粒径分 布，扫描电镜分析了表面形貌，能谱仪确定了所含元素.对NaClO3,NaClo3与CoO,NaClo,、CoO4与Mm的混合物分别进行 了热重与示差扫描量热联合分析实验(TGA-DSC),通过对比各混合物热解起始温度及其他特征温度，探究了Mn金属粒径对 NaC1O,热解的催化强度与热解稳定性的影响.研究结果表明：Co,O,虽对NaClO,热解具有催化性，热解开始温度(T,)由 512.3℃下降为333.0℃，但其可导致NaCI03热解的不稳定，热解阶梯由1个变为3个：Mn金属燃料对NaCl0,中间产物具有 明显的催化性，且随着粒径减小，催化强度逐渐增加.热解终止温度(T)由419.8℃下降为351.9℃，同时NCIO,热解阶梯减 少，热解温度区间变窄（由180.6℃减小为19.4℃），热解更加稳定. 关键词氧烛：金属燃料：粒径：氯酸钠：热分解 分类号X936 Catalytic effect of Mn particle size on thermal decomposition of sodium chlorate in oxygen generators LIU Jian-guo2),JIN Long-zhe2),GAO Na,WANG Shu23),ZHANG Hao'23) 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 Emergeney Technology Research Center,University of Seience and Technology Beijing,Beijing 100083,China Corresponding author,E-mail:13810278308@163.com ABSTRACT Two groups of Mn metal fuels with different particle-size distributions were prepared with median diameters of 18.73 and 5.24 pm.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 Na- ClO,,the NaClO,and CoO as well as NaClO,,Co0,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 NaClO,were investigated by comparing the pyrolysis onset/final temperature and other characteristics.The results show that although Co,O has a significant cata- lytic effect on the pyrolysis of NaClO,e.g.,the onset pyrolysis temperature decreases from 512.3 to 333.0C,it can lead to insta- bility in NaClO pyrolysis,namely the pyrolysis steps from I to 3.The Mn metal fuel has a clear catalysis effect on the intermediate products of NaClO pyrolysis.With the decrease in particle size,the catalytic effect gradually increases and the pyrolysis final temper- ature Tr decreases from 419.8 to 351.9 C.Meanwhile,the pyrolysis step of NaClO,decreases and the temperature range of pyrolysis decreases from 180.6 to 19.4C,indicating that the pyrolysis process becomes more stable. KEY WORDS oxygen generator;metal fuel;particle size;sodium chlorate;thermal decomposition 收稿日期：2017-03-09 基金项目：国家自然科学基金资助项目(51504017)：中国博土后资助基金资助项目(2014T70039,2013M540866):中央高校基本科研业务经 费资助项目(FRF-TP-15-043A3):教有部博士点资助项目(20130006120020)工程科学学报,第 39 卷,第 8 期:1159鄄鄄1165,2017 年 8 月 Chinese Journal of Engineering, Vol. 39, No. 8: 1159鄄鄄1165, August 2017 DOI: 10. 13374 / j. issn2095鄄鄄9389. 2017. 08. 004; http: / / journals. ustb. edu. cn 氧烛中锰金属粒径对氯酸钠热解的催化作用 刘建国1,2,3) , 金龙哲1,2,3) , 高 娜1,2,3) 苣 , 汪 澍1,2,3) , 张 浩1,2,3) 收稿日期: 2017鄄鄄03鄄鄄09 基金项目: 国家自然科学基金资助项目(51504017);中国博士后资助基金资助项目(2014T70039, 2013M540866);中央高校基本科研业务经 费资助项目(FRF鄄鄄TP鄄鄄15鄄鄄043A3);教育部博士点资助项目(20130006120020) 1) 北京科技大学土木与资源工程学院, 北京 100083 2) 北京科技大学金属矿山高效开采与安全教育部重点实验室, 北京 100083 3) 北京科技大学矿井避险技术研究中心, 北京 100083 苣 通信作者, E鄄mail: 13810278308@ 163. com 摘 要 分别制备了两组粒径的 Mn 金属燃料(平均粒径分别为 18郾 73 和 5郾 24 滋m),利用激光粒度分析仪测试了其粒径分 布,扫描电镜分析了表面形貌,能谱仪确定了所含元素. 对 NaClO3 ,NaClO3 与 Co3O4 ,NaClO3 、Co3O4 与 Mn 的混合物分别进行 了热重与示差扫描量热联合分析实验(TGA鄄鄄DSC),通过对比各混合物热解起始温度及其他特征温度,探究了 Mn 金属粒径对 NaClO3 热解的催化强度与热解稳定性的影响. 研究结果表明:Co3O4 虽对 NaClO3 热解具有催化性,热解开始温度( To ) 由 512郾 3 益下降为 333郾 0 益 ,但其可导致 NaClO3 热解的不稳定,热解阶梯由 1 个变为 3 个;Mn 金属燃料对 NaClO3 中间产物具有 明显的催化性,且随着粒径减小,催化强度逐渐增加,热解终止温度(Tf)由 419郾 8 益下降为 351郾 9 益 ,同时 NaClO3 热解阶梯减 少,热解温度区间变窄(由 180郾 6 益减小为 19郾 4 益 ),热解更加稳定. 关键词 氧烛; 金属燃料; 粒径; 氯酸钠; 热分解 分类号 X936 Catalytic effect of Mn particle size on thermal decomposition of sodium chlorate in oxygen generators LIU Jian鄄guo 1,2,3) , JIN Long鄄zhe 1,2,3) , GAO Na 1,2,3) 苣 , 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鄄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 苣 Corresponding author, E鄄mail: 13810278308@ 163. com ABSTRACT Two groups of Mn metal fuels with different particle鄄size distributions were prepared with median diameters of 18郾 73 and 5郾 24 滋m. The particle鄄size distribution was measured by a laser particle鄄size analyzer, the surface morphology was analyzed via scanning electron microscopy (SEM), and energy dispersive spectrometry (EDS) determined the contained elements. For the Na鄄 ClO3 , the NaClO3 and Co3O4 as well as NaClO3 , Co3O4 , and Mn mixtures were subjected to TGA鄄鄄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 cata鄄 lytic effect on the pyrolysis of NaClO3 , e. g. , the onset pyrolysis temperature decreases from 512郾 3 to 333郾 0 益 , it can lead to insta鄄 bility 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 temper鄄 ature Tf decreases from 419郾 8 to 351郾 9 益 . Meanwhile, the pyrolysis step of NaClO3 decreases and the temperature range of pyrolysis decreases from 180郾 6 to 19郾 4 益 , indicating that the pyrolysis process becomes more stable. KEY WORDS oxygen generator; metal fuel; particle size; sodium chlorate; thermal decomposition