期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 47, 期 55, 页码 23310-23315出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2022.05.119
关键词
Direct fuel; Indirect fuel; Hydrogen; Hydrolysis; Sodium borohydride; Stability
资金
- Agence Nationale pour la Recherche (ANR) [w/ref ANR-16-CE05-0009]
This study investigates the instability of alkaline aqueous solution of sodium borohydride (SB-fuel), finding that it can be relatively stable under cold conditions (-15 and 4 degrees C) when the NaOH concentration is >= 8M, mitigating the spontaneous hydrolysis of NaBH4.
Alkaline aqueous solution of sodium borohydride NaBH4 (denoted SB-fuel) is an indirect fuel when it is used to generate H2 by hydrolysis, with the as-generated H2 feeding a fuel cell, and it is a direct fuel when it is an anodic fuel of a direct fuel cell. However, SB-fuel suffers from a major drawback: NaBH4 spontaneously hydrolyzes. Our study falls within this context. We studied the instability, at the NMR scale and over 12 weeks, of a series of SB-fuels (initial NaBH4 concentration from 3.65 to 31.22 wt%, NaOH concentration from 1 to 16 M, and temperature between -15 and 60 degrees C) to find the conditions at which SB-fuel can be stored for weeks in relative safety. We found that SB-fuel with a NaOH concentration of >= 8 M is relatively stable under cold conditions (-15 and 4 degrees C). In these conditions, NaBH4 is not prevented from hydrolyzing, but the reaction is significantly mitigated. Otherwise, our study highlights the gaps in our understanding of the SB-fuel, emphasizes SB-fuel is a new concept of fuel (it should not be seen as any current fuel) , points out the challenges for attaining higher technology readiness levels.(c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据