کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1283025 | 1497620 | 2009 | 7 صفحه PDF | دانلود رایگان |
Thermogravimetric analysis of LiAlH4 chemically mixed with different additives is reported for the application of hydrogen storage. Here, we illustrated the dehydrogenation properties of combined LiAlH4/LiNH2 (2:1) mixture and LiAlH4 wet-doped with different transition metals (Sc, Ti, and V) in their chloride forms. Thermal gravimetric analysis of LiAlH4/LiNH2 system released ∼7.9 wt.% of hydrogen in three decomposition steps at temperatures between 75 and 280 °C under a heating ramp of 5 °C min−1. The LiAlH4 doped with transition metals showed the decrease of decomposition temperature down to 30–40 °C for both 1st and 2nd dehydrogenation steps as compared to as-received LiAlH4. The catalytic activity in lowering the dehydrogenation temperature of LiAlH4 doped with transition metals increases in the order of pure LiAlH4 < V < Ti < Sc. The X-ray diffraction analysis, field emission scanning electron microscopy, and Fourier transformation infra-red spectroscopy techniques were carried out in support of the thermogravimetric results.
Journal: International Journal of Hydrogen Energy - Volume 34, Issue 21, November 2009, Pages 8937–8943