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Published in:
2015 | OriginalPaper | Chapter
41. The Effect of Temperature and Initial Concentration on Synthesis of Ammonia Borane
Authors : Derya Öncel Özgür, Göksel Özkan
Published in: Progress in Clean Energy, Volume 1
Publisher: Springer International Publishing
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Abstract
In this work, production of ammonium borane (NH3BH3, abbreviated as AB) was studied. In synthesis works, the effect of reaction temperature and reactive inlet material concentrations on the conversion into AB were examined. Synthesis of ammonium borane was obtained from the reaction of NaBH4 and (NH4)2SO4 in THF. As a result of parametrical experiments, it has been determined that product conversion yield is increased from 95.3 to 98.2 % and reaction period is decreased by up to 2 h and product purity value is increased up to 100 % when reaction temperature is increased from 25 to 50 °C. It has been determined that when increased amount of reactive materials is compared with stoichiometric amounts, product conversion increased but limiting agent in the reaction is determined to be NaBH4. According to FTIR, XRD, and 11B NMR analyses results, AB may be synthesized up to purity phase.