Mn_xNi_((1-x))O催化剂对LiClO_4分解的催化性能研究
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摘要
为提高潜艇等密闭空间所使用的氧烛的体积储氧量,通过溶胶-凝胶法制备了Ni:Mn=6:1,3:1,2:1,1:1,1:2,1:3,1:6七种Mnx Ni(1-x)O催化剂,将其与LiClO_4进行热重-差热分析(TG-DTA),通过对比空白样品和各混合样品的起始分解温度和最大分解速率温度,探究了Mn_xNi_((1-x))O催化剂对LiClO_4分解的催化性能。研究结果表明,Mn_xNi_((1-x))O催化剂对LiClO_4分解有很好的催化作用,起始分解温度降低128±13℃,其中Ni:Mn=1:6的催化性能最佳,起始分解温度为312℃,在372℃时的分解速率达到10.8%/min,分解温程最窄。
In order to improve Oxygen candles sealed space submarines used oxygen storage volume. Seven kinds of Mn_xNi_((1-x))O catalysts were prepared by sol-gel method. The thermogravimetry-differential thermal analysis(TG-DTA) was carried out with LiClO4. The decomposition of LiClO_4 by Mn_xNi_((1-x))O catalysts were investigated by comparing the initial decomposition temperature and the maximum decomposition rate temperature of the blank sample and each mixed sample catalytic performance. The results show that the Mn_xNi_((1-x))O catalyst has a good catalytic effect on the decomposition of LiClO_4, and the initial decomposition temperature is reduced by 128±13 ℃. The catalytic performance of Ni:Mn=1:6 is the best, and the initial decomposition temperature is obtained. At 312 ℃, the decomposition rate at 372 ℃ reached 10.8%/min,and the decomposition temperature was the narrowest.
In order to improve Oxygen candles sealed space submarines used oxygen storage volume. Seven kinds of Mn_xNi_((1-x))O catalysts were prepared by sol-gel method. The thermogravimetry-differential thermal analysis(TG-DTA) was carried out with LiClO4. The decomposition of LiClO_4 by Mn_xNi_((1-x))O catalysts were investigated by comparing the initial decomposition temperature and the maximum decomposition rate temperature of the blank sample and each mixed sample catalytic performance. The results show that the Mn_xNi_((1-x))O catalyst has a good catalytic effect on the decomposition of LiClO_4, and the initial decomposition temperature is reduced by 128±13 ℃. The catalytic performance of Ni:Mn=1:6 is the best, and the initial decomposition temperature is obtained. At 312 ℃, the decomposition rate at 372 ℃ reached 10.8%/min,and the decomposition temperature was the narrowest.
引文
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[11]ZHANG Yan-wei,YAN Ke,QIU Kun-zan.Catalyst for lithium perchlorate decomposition[J].Journal of Propulsion and Power,2015,31(5):1445-1451.
[12]MMARKOWITZ M,D ABORYTA.The decomposition kinetics of lithium perchlorate[J].The journal of Physical Chemistry Chemistry,1961,65(8):1419-1424.
[2]范敏,卜建杰,郑邯勇.氧烛的研究现状与发展[J].船舰科学技术,2007,28(2):16-20.
[3]闫科,张彦威,王永昌.高氯酸锂分解动力学研究[J].固体火箭技术,2013,36(3):353-357.
[4]RUDLOFF W K,FREEMAN E S.The catalytic effect of metal oxides on thermal decomposition of potassium chlorate and potassium perchlorate as detected by thermal.analysis methods[J].The Journal of Physical Chemistry,1970,74(18):3317-3324.
[5]KOVALENKO A N,IVANOV G V.Physicochemical transformations in mixtures of lithium perchlorate with finely divided metals in shock compression[J].Combustion Explosion&Shock Waves,1983,19(4):p.481-484.
[6]CANNON J C,ZHANG T C.Catalytic decomposition of potassium chlorate[J].Journal of Thermal Analysis,1994,41:p.981-993.
[7]LEE J S,HSU C K.The DSC studies on the phase transition,decomposition and melting of potassium perchlorate with additives[J].Thermochimica Acta,2001,367-368:p.367-370.
[8]江治,李疏芬,赵凤起.纳米镍粉对高氯酸铵热分解的影响[J].推进技术,2003,24(5):460-463.
[9]WACHOWSKI L,CZAJKA B.Textural and catalytic properties of the FexOy/Fe-KClO4 system[J].Thermochimica Acta,2005,435(1):p.102-107.
[10]戴洪兴,何洪,李佩珩.稀土钙钛矿型氧化物催化剂的研究进展[J].中国稀土学报,2003,21(Spec):p.1-15.
[11]ZHANG Yan-wei,YAN Ke,QIU Kun-zan.Catalyst for lithium perchlorate decomposition[J].Journal of Propulsion and Power,2015,31(5):1445-1451.
[12]MMARKOWITZ M,D ABORYTA.The decomposition kinetics of lithium perchlorate[J].The journal of Physical Chemistry Chemistry,1961,65(8):1419-1424.