NaBH4 regeneration from NaBO2 by high-energy ball milling and its plausible mechanism
Author(s)
Lang, Chengguang
Jia, Yi
Liu, Jiangwen
Wang, Hui
Ouyang, Liuzhang
Zhu, Min
Yao, Xiangdong
Griffith University Author(s)
Year published
2017
Metadata
Show full item recordAbstract
In this paper, we developed an easy and simple method (high-energy ball milling) for recycling NaBO2 (the hydrolysis byproduct) back to NaBH4 by a reaction with MgH2. To optimize the yield of NaBH4, we investigated the effect of four parameters, e.g. the ball milling time, the molar ratio of MgH2/NaBO2, H2 pressure and addition of methanol, on the NaBH4 regeneration. Accordingly, the maximum yield of NaBH4 (89 wt. %) was achieved. The mechanism of NaBH4 regeneration has been discussed. It is indicated that the NaBH4 formation involves a two-step substitution in which NaBOH2 is an intermediate confirmed by solid-state nuclear ...
View more >In this paper, we developed an easy and simple method (high-energy ball milling) for recycling NaBO2 (the hydrolysis byproduct) back to NaBH4 by a reaction with MgH2. To optimize the yield of NaBH4, we investigated the effect of four parameters, e.g. the ball milling time, the molar ratio of MgH2/NaBO2, H2 pressure and addition of methanol, on the NaBH4 regeneration. Accordingly, the maximum yield of NaBH4 (89 wt. %) was achieved. The mechanism of NaBH4 regeneration has been discussed. It is indicated that the NaBH4 formation involves a two-step substitution in which NaBOH2 is an intermediate confirmed by solid-state nuclear magnetic resonance (NMR).
View less >
View more >In this paper, we developed an easy and simple method (high-energy ball milling) for recycling NaBO2 (the hydrolysis byproduct) back to NaBH4 by a reaction with MgH2. To optimize the yield of NaBH4, we investigated the effect of four parameters, e.g. the ball milling time, the molar ratio of MgH2/NaBO2, H2 pressure and addition of methanol, on the NaBH4 regeneration. Accordingly, the maximum yield of NaBH4 (89 wt. %) was achieved. The mechanism of NaBH4 regeneration has been discussed. It is indicated that the NaBH4 formation involves a two-step substitution in which NaBOH2 is an intermediate confirmed by solid-state nuclear magnetic resonance (NMR).
View less >
Journal Title
International Journal of Hydrogen Energy
Volume
42
Subject
Chemical sciences
Engineering
Chemical engineering design