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Thermal Decomposition of Ammonia Borane for $H_2$ Release  

Lee, Ji-Hong (School of Chemical Engineering, Sungkyunkwan Univ.)
Lee, Hyun-Joo (Clean Energy Research Center, Korea Institute of Science and Technology)
Ahn, Byoung-Sung (Clean Energy Research Center, Korea Institute of Science and Technology)
Kim, Chang-Soo (Clean Energy Research Center, Korea Institute of Science and Technology)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.19, no.4, 2008 , pp. 299-304 More about this Journal
Abstract
Thermal decomposition of Ammonia Borane have been investigated with various analytical methods including TGA, TP-MS, DSC. By-products such as aminoborane and borazine were identified during hydrogen release by TGA, TP-MS analysis. $H_2$ release amount was measured at each temperature isothermally, which resulted in 7 wt% $H_2$ release at 130$^{\circ}C$. Moreover, higher temperature enhanced hydrogen release kinetics leading to shortened induction period from 20 min at 95$^{\circ}C$ to 0 min at 130$^{\circ}C$. Melting and decomposition at close temperature (4$^{\circ}C$ difference) caused the formation of thin foam during hydrogen release. Suppression of by-products and thin foam formation during hydrogen release is suggested as critical issues to realize chemical hydrogen storage system with ammonia borane.
Keywords
ammonia borane; thermal decomposition; chemical hydrogen storage$H_2$ release;
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