کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1281940 | 1497668 | 2007 | 6 صفحه PDF | دانلود رایگان |
This paper presents a new process for producing sodium borohydride (NaBH4)(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)(Na2B4O7) is sintered with quartz powder (SiO2)(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 NaBH4NaBH4 with excellent yield.
Journal: International Journal of Hydrogen Energy - Volume 32, Issue 16, November 2007, Pages 3981–3986