直接氢化法制备氢化铝钠及性质  

Preparation of NaAlH_4 by direct hydrogenation and characterization

作　　者：曹杰敏 王军勤 高建峰[1] 龚浩[1] 黄媛媛[1] 高生旺[1] CAO Jie-min WANG Jun-qin GAO Jian-feng GONG Hao HUANG Yuan-yuan GAO Sheng-wang(Department of Chemistry, North University of China,Taiyuan 030051, China)

机构地区：[1]中北大学理学院,太原030051

出　　处：《固体火箭技术》2016年第5期655-658,663,共5页Journal of Solid Rocket Technology

基　　金：山西省自然科学基金(2013011040-3);山西省攻关资助项目(20130321022-02)

摘　　要：以普通铝粉、卤代烃、氢化钠和H2等为主要原料,在常压低于100℃的条件下,采用铝的格氏试剂法,成功制备出氢化铝钠Na Al H4。通过FTIR、XRD表征,结合元素分析,研究其成分及结构,表明样品为氢化铝钠,实际与理论产率比值达到90%以上;根据SEM和online MS,对其进行表面形貌和稳定性研究。结果显示,晶体结构较完整,室温下稳定性好,自身储氢量与市售样品相当。该方法实现了常压下氢化铝钠的制备,且反应在常压下进行,产率和原料利用率都达到了工业要求,对其生产工艺的改进具有促进作用。Sodium aluminum hydride was prepared by direct hydrogenation below 100 ℃ and atmospheric pressure,with ordina- ry aluminum, halogenated hydrocarbons, sodium hydride and H2 as main material. Its composition and structure were determined by FTIR and XRD, combined with the results of elemental analysis, showing that the sample is NaAlH4, and the yield more than 90%. The surface morphology and stability of NaAlH4 was characterized by SEM and online MS.Results show that it possesses complete crystal structure and good stability.Its hydrogen storage capacity is equivalent to the commercial sample.Sodium aluminum hydride was successfully prepared with this method under atmospheric pressure, and the yield and utilization of raw materials reach the in- dustrial requirements,which have a role in promoting the improvement of production processes.

关 键 词：活化 直接氢化 多相反应 制备 氢化铝钠 

分 类 号：V512[航空宇航科学与技术—航空宇航推进理论与工程]