ALUMINUM HYDRIDE, A1H3, AS A HYDROGEN STORAGE COMPOUND.

GRAETZ, J. ; REILLY, J. ; SANDROCK, G. ; JOHNSON, J. ; ZHOU, W.M. ; WEGRZYN, J.

Brookhaven National Laboratory

关键词: Aluminium;    Hydrides;    08 Hydrogen;    Kinetics;    Thermodynamics;   

DOI  :  10.2172/899889
RP-ID  :  BNL--77336-2006
RP-ID  :  DE-AC02-98CH10886
RP-ID  :  899889

美国|英语

来源: UNT Digital Library

【 摘 要 】

Aluminum hydride is a covalent, binary hydride that has been known for more than 60 years and is an attractive medium for on-board automotive hydrogen storage, since it contains 10.1% by wt. hydrogen with a density of 1.48 g/ml. There are at least 7 non-solvated AlH{sub 3} phases, namely {alpha}, {alpha}{prime}, {beta}, {gamma}, {var_epsilon} and {zeta}. The properties of {alpha}-AlH{sub 3}, obtained from the Dow Chemical Co. in 1980, have been previously reported. Here we present a description of the thermodynamic and kinetic properties of freshly prepared {alpha}, {beta} and {gamma} phases of AlH{sub 3}. In all cases the decomposition kinetics are appreciable below 100 C and all will meet the DOE 2010 gravimetric and volumetric vehicular system targets (6 wt% H{sub 2} and 0.045 kg/L). However, further research will be required to develop an efficient and economical process to regenerate AlH{sub 3} from the spent Al powder.