Hydrogen storage in amine boranes: Ionic liquid supported thermal dehydrogenation of ethylene diamine bisborane

A variety of ionic liquids has been tested for its catalytic effect on the dehydrogenation of ethylene diamine bisborane (EDB). The catalytic activity of ionic liquids, such as 1-butyl-2,3-dimethylimidazolium chloride ([BMMIM]Cl), 1-butyl-2,3-dimethylimidazolium acetate ([BMMIM][OAc]), 1-butyl-3-met...

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Bibliographic Details
Published in:International journal of hydrogen energy 2013-03, Vol.38 (8), p.3283-3290
Main Authors: Sahler, Sebastian, Konnerth, Hannelore, Knoblauch, Nicole, Prechtl, Martin H.G.
Format: Article
Language:English
Subjects:
Acetates
Alternative fuels. Production and utilization
Ammonia borane
Applied sciences
Dehydrogenation
Energy
Ethylene diamine bisborane
Exact sciences and technology
Fuels
Hydrogen
Hydrogen storage
Ionic liquids
Polarity
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Summary:A variety of ionic liquids has been tested for its catalytic effect on the dehydrogenation of ethylene diamine bisborane (EDB). The catalytic activity of ionic liquids, such as 1-butyl-2,3-dimethylimidazolium chloride ([BMMIM]Cl), 1-butyl-2,3-dimethylimidazolium acetate ([BMMIM][OAc]), 1-butyl-3-methylimidazolium acetate ([BMIM][OAc]) and 1-butyl-3-methylimidazolium methylsulfonate ([BMIM][OMs]) is compared and the mixture [BMMIM]Cl/EDB was investigated. This system is able to deliver about 6.5 wt% of hydrogen at 140 °C competing with conventional hydrogen storage pressure tanks. The correlation between polarity of the ILs and hydrogen yield was investigated and the suitability for hydrogen storage systems is evaluated and discussed. [Display omitted] ► Fast H2-generation from ethylene diamine bisborane (EDB) promoted by ionic liquids. ► Faster generation and higher total hydrogen yield from EDB in presence of IL. ► EDB/IL release H2 within minutes between 100 and 140 °C. ► Systems deliver 6.5 wt% of H2 at 140 °C competing with conventional H2 storage tanks. ► The correlation between the important polarity of ILs and H2 yields was evaluated.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2012.12.150