工程科学学报2017，Vol.39Issue(8)：1159-1165,7.DOI:10.13374/j.issn2095-9389.2017.08.004
氧烛中锰金属粒径对氯酸钠热解的催化作用
Catalytic effect of Mn particle size on thermal decomposition of sodium chlorate in oxygen generators
摘要
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 Na-ClO3 , the NaClO3 and Co3 O4 as well as NaClO3 , Co3 O4 , 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 Co3 O4 has a significant cata-lytic effect on the pyrolysis of NaClO3 , e. g. , the onset pyrolysis temperature decreases from 512. 3 to 333. 0 ℃ , it can lead to insta-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-ature Tf 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.关键词
氧烛/金属燃料/粒径/氯酸钠/热分解Key words
oxygen generator/metal fuel/particle size/sodium chlorate/thermal decomposition分类
资源环境引用本文复制引用
刘建国,金龙哲,高娜,汪澍,张浩..氧烛中锰金属粒径对氯酸钠热解的催化作用[J].工程科学学报,2017,39(8):1159-1165,7.基金项目
国家自然科学基金资助项目(51504017) （51504017）
中国博士后资助基金资助项目(2014T70039,2013M540866) （2014T70039,2013M540866）
中央高校基本科研业务经费资助项目(FRF-TP-15-043A3) （FRF-TP-15-043A3）
教育部博士点资助项目(20130006120020) （20130006120020）
