化工学报 ›› 2007, Vol. 58 ›› Issue (11): 2793-2797.

• 催化、动力学与反应器 • 上一篇    下一篇

Mg2NiH4储氢材料的制备及对高氯酸铵热分解的催化作用

支春雷;宋洪昌;李凤生;刘磊力;刘宏英;谈玲华   

  1. 南京理工大学国家特种超细粉体工程技术研究中心
  • 出版日期:2007-11-05 发布日期:2007-11-05

Preparation of Mg2NiH4 and its catalytic characteristics of thermal decomposition of ammonium perchlorate

ZHI Chunlei;SONG Hongchang;LI Fengsheng;LIU Leili;LIU Hongying;TAN Linghua   

  • Online:2007-11-05 Published:2007-11-05

摘要:

采用置换-扩散法制备得到Mg2NiH4,用SEM、XRD和DSC等对其结构和性能进行了表征。Mg2NiH4纯度较高,含氢量为3.6%,放氢温度为292.4℃。用DSC法研究了Mg2NiH4对高氯酸铵(AP)热分解的催化性能。结果表明:加入含量为10%的Mg2NiH4可使AP高温放热峰温降低108.2℃,使表观分解热增加217.0%,Mg2NiH4对高氯酸铵热分解具有良好的催化作用。Mg2NiH4含量增加,对高氯酸铵热分解的催化作用增强。初步探讨了Mg2NiH4催化高氯酸铵热分解的作用机理。

关键词: 储氢材料, Mg2NiH4, 高氯酸铵, 热分解

Abstract:

Mg2NiH4 was prepared by the replacement-diffusion method,and its structure was characterized with SEM,XRD and DSC.Mg2NiH4 had high purity,a great deal of crackle on the surface,and high activity.Its hydrogen-storage capacity was 3.6% and affranchising hydrogen temperature was 292.4℃.DSC results showed that Mg2NiH4 had good catalytic effect on the thermal decomposition of ammonium perchlorate(AP).When the content of Mg2NiH4 reached 10%(mass),the high temperature exothermic peak of AP was decreased by 108.2℃ and the exothermic heat increased by 217.0%.Meanwhile,the catalysis mechanism was discussed.

Key words: 储氢材料, Mg2NiH4, 高氯酸铵, 热分解