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Enhanced Thermal Dehydrogenation of Ammonia Borane by d-Mannitol
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-12-31 , DOI: 10.1021/acs.iecr.9b05343 Geo Jong Kim 1 , Alisha M. Boone 1 , Michael Chesnut 1 , Jung Hun Shin , Jihoon Jung , Hyun Tae Hwang 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-12-31 , DOI: 10.1021/acs.iecr.9b05343 Geo Jong Kim 1 , Alisha M. Boone 1 , Michael Chesnut 1 , Jung Hun Shin , Jihoon Jung , Hyun Tae Hwang 1
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Hydrogen release from solid-state ammonia borane (AB, NH3BH3) exhibits a long induction period and requires a relatively high temperature. In the present work, d-mannitol (DM, C6H8(OH)6) was used as an additive to enhance the hydrogen release properties of AB. At proton exchange membrane (PEM) fuel cell operating temperatures, the influence of various operating process parameters (temperature and heating rate) and AB–DM ratio has been investigated. In addition, the composition of gaseous products was analyzed to identify the reaction mechanism using mass spectrometry. In particular, the formation of ammonia, which poisons PEM fuel cells, was quantitatively analyzed. Using solid-state nuclear magnetic resonance, solid products were characterized to better understand the mechanism of AB thermolysis. In the presence of DM, the onset reaction temperature decreased to 80 °C, whereas dehydrogenation kinetics were significantly improved. With DM as an additive, we obtained a high hydrogen yield of 9.1 wt % (1.75 H2 equivalent) at the PEM fuel cell operating temperature (90 °C).
中文翻译：
d-甘露糖醇增强氨硼烷的热脱氢
从固态氨硼烷（AB，NH 3 BH 3）释放的氢具有较长的诱导期，并且需要相对较高的温度。在目前的工作中，d-甘露醇（DM，C 6 H 8（OH）6）被用作添加剂以增强AB的氢释放性能。在质子交换膜（PEM）燃料电池的工作温度下，已经研究了各种工作过程参数（温度和加热速率）和AB-DM比的影响。另外，使用质谱分析气态产物的组成以鉴定反应机理。尤其是，定量分析了毒害PEM燃料电池的氨气的形成。使用固态核磁共振，对固体产物进行了表征，以更好地了解AB热解的机理。在DM的存在下，起始反应温度降低至80℃，而脱氢动力学得到显着改善。使用DM作为添加剂，我们获得了9.1 wt％（1.75 H2个当量）在PEM燃料电池工作温度（90°C）下。
更新日期：2020-01-01
中文翻译：
d-甘露糖醇增强氨硼烷的热脱氢
从固态氨硼烷（AB，NH 3 BH 3）释放的氢具有较长的诱导期，并且需要相对较高的温度。在目前的工作中，d-甘露醇（DM，C 6 H 8（OH）6）被用作添加剂以增强AB的氢释放性能。在质子交换膜（PEM）燃料电池的工作温度下，已经研究了各种工作过程参数（温度和加热速率）和AB-DM比的影响。另外，使用质谱分析气态产物的组成以鉴定反应机理。尤其是，定量分析了毒害PEM燃料电池的氨气的形成。使用固态核磁共振，对固体产物进行了表征，以更好地了解AB热解的机理。在DM的存在下，起始反应温度降低至80℃，而脱氢动力学得到显着改善。使用DM作为添加剂，我们获得了9.1 wt％（1.75 H2个当量）在PEM燃料电池工作温度（90°C）下。
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