Innovation in sodium borohydride production process from borosilicate glass with sodium under hydrogen atmosphere: “high pressure process”
Innovation in sodium borohydride production process from borosilicate glass with sodium under hydrogen atmosphere: “high pressure process”
复制标题
DOI：
10.1016/j.ijhydene.2007.04.047
复制
发表时间：
2007-11
影响因子：
7.2
通讯作者：
A. Kanturk;S. Pişkin
中科院分区：
文献类型：
--
作者：
A. Kanturk;S. Pişkin
介绍了一种生产硼氢化钠（NaBH4）的新工艺，NaBH4可作为储氢介质。这个过程是基于硼硅酸盐玻璃在大约400到500°C的温度下，在22atm的高压下的转化反应。为此，将硼砂（Na2B4O7）与石英粉（SiO2）烧结得到硼硅酸盐玻璃，然后在高压下用金属钠（Na）加热。利用反应过程中氢气压降随反应时间的变化，对硼硅玻璃的加氢特性进行了研究。结果表明，在475°C下，在22atm氢气压力下加氢所需时间为70min，才能得到收率高的nabh4。
This paper presents a new process for producing sodium borohydride (NaBH4), which can be used as a hydrogen storage medium. The process is based on the conversion reaction of borosilicate glass at temperatures between about 400 and 500∘C under high hydrogen pressure of 22atm. For this purpose, borax (Na2B4O7) is sintered with quartz powder (SiO2) to obtain borosilicate glass then heated with metallic sodium (Na) under high hydrogen pressure. Furthermore, a study of the hydrogenation characteristics of borosilicate glass has been made using change in hydrogen pressure drop as function of reaction time in the process. It is concluded that the required hydrogenation time is 70min at 475∘C under 22atm of hydrogen pressure for production of NaBH4with excellent yield.