Accelerated thermal decomposition of AlH3 for hydrogen-fueled vehicles |
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| Authors: | G Sandrock J Reilly J Graetz W-M Zhou J Johnson J Wegrzyn |
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| Institution: | (1) Contractor to DOE Sandia National Laboratories, SunaTech, Inc., 113 Kraft Place, Ringwood, NJ 07456, USA;(2) Department of Energy Science and Technology, Brookhaven National Laboratory, Upton, NY 11973, USA |
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| Abstract: | The potential for using aluminum hydride, AlH3, for vehicular hydrogen storage is explored. It is shown that particle-size control and doping of AlH3 with small levels of alkali-metal hydrides (e.g. LiH) results in accelerated desorption rates. For AlH3–20 mol % LiH, 100 °C desorption kinetics are nearly high enough to supply vehicles. It is highly likely that 2010 gravimetric and volumetric vehicular system targets (6 wt% H2 and 0.045 kg/L) can be met with onboard AlH3. However, a new, low-cost method of off-board regeneration of spent Al back to AlH3 is needed. PACS 68.43.Vx; 68.43.Mn; 83.80.Fg; 84.60.Ve; 51.30.+i; 61.10.Nz |
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