期刊
ENERGIES
卷 14, 期 12, 页码 -出版社
MDPI
DOI: 10.3390/en14123567
关键词
hydrogen; sodium borohydride; regeneration of sodium borohydride; thermochemical processes; mechano-chemical processes; electrochemical processes; hydrogen cycle
资金
- Programa Operacional Espaco Atlantico
- Fundo Europeu de Desenvolvimento Regional (FEDER) [EAPA_204/2016]
- FEDER via CEFT
The potential of NaBH4-H2-PEMFC system for on-demand power supply is highlighted, although most research focuses on catalytic performance. The challenge of developing a practical reaction system for closing the NaBH4-H2 cycle remains critical, despite efficient NaBH4 regeneration processes being reported. Additionally, a transition towards cleaner methods has been observed over the years.
In 2007, the US Department of Energy recommended a no-go on NaBH4 hydrolysis for onboard applications; however, the concept of a NaBH4-H-2-PEMFC system has the potential to become a primary source for on-demand power supply. Despite the many efforts to study this technology, most of the published papers focus on catalytic performance. Nevertheless, the development of a practical reaction system to close the NaBH4-H-2 cycle remains a critical issue. Therefore, this work provides an overview of the research progress on the solutions for the by-product rehydrogenation leading to the regeneration of NaBH4 with economic potential. It is the first to compare and analyze the main types of processes to regenerate NaBH4: thermo-, mechano-, and electrochemical. Moreover, it considers the report by Demirci et al. on the main by-product of sodium borohydride hydrolysis. The published literature already reported efficient NaBH4 regeneration; however, the processes still need more improvements. Moreover, it is noteworthy that a transition to clean methods, through the years, was observed.
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