Efficient chemical regeneration of LiBH4NH3 spent fuel for hydrogen storage. (5th January 2015)

• Record Type: Journal Article
• Authors: Tan, Yingbin; Chen, Xiaowei; Xia, Guanglin; Yu, Xuebin
• Is Part Of: International journal of hydrogen energy. Volume 40:Number 1(2015)
• Page Start: 146
• Page End: 150
• Publication Date: 2015-01-05
• Subjects: Hydrogen storage -- Ammine metal borohydrides -- Chemical regeneration; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2014.11.040
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: The absence of an efficient method for the regeneration of ammine metal borohydrides (M(BH4 )n x NH3, AMBs) from their dehydrogenated products has hindered their potential application as hydrogen storage materials. In this paper, we demonstrate a high-yield chemical regeneration of LiBH4 NH3 based on a three step process (digestion (H + addition), reduction (H − addition), and ammonia complexation) at ambient temperature. Our results demonstrated that Li–B–N polymer was digested by methanol to form LiB(OCH3 )4, which can be converted into LiBH4 by using LiAlH4 in the reduction process. The generation of LiBH4 NH3 in ammonia complexion step was achieved by exposing the obtained LiBH4 in an ammonia atmosphere. Graphical abstract: Chemical regeneration of LiBH4 NH3 from its spent fuel was achieved based on digestion, reduction and ammonia complexation reactions. Highlights: An efficient chemical regeneration of LiBH4 NH3 was reported. Digestion, reduction and ammonia complexation were applied for the recycle scheme. A total yield of over 82% was obtained after a full regeneration recycle.