SciTech Connect

Title: ALUMINUM HYDRIDE, A1H3, AS A HYDROGEN STORAGE COMPOUND.

ALUMINUM HYDRIDE, A1H3, AS A HYDROGEN STORAGE COMPOUND. 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.
Authors: ; ; ; ; ;
Publication Date:
OSTI Identifier:899889
Report Number(s):BNL--77336-2006
R&D Project: 05465; EB4202000; TRN: US200709%%505
DOE Contract Number:DE-AC02-98CH10886
Resource Type:Technical Report
Data Type:
Resource Relation:Related Information: ADVANCED MATERIALS FOR ENERGY CONVERSION III; SAN ANTONIO, TEXAS; 20060312 through 20060316
Research Org:BROOKHAVEN NATIONAL LABORATORY
Sponsoring Org:Doe - Office Of Science
Country of Publication:United States
Language:English
Subject: 08 HYDROGEN; ALUMINIUM; HYDRIDES; HYDROGEN; HYDROGEN STORAGE; KINETICS; TARGETS; THERMODYNAMICS