AP-115 – Toward the Direct Synthesis of Alane: Hydrogenation Studies of
Aluminum in Supercritical Fluid Media

AP-115 – Toward the Direct Synthesis of Alane: Hydrogenation Studies of
Aluminum in Supercritical Fluid Media

Aluminum hydride (alane) has received a great deal of interest in recent years due its possible use as a hydrogen storage material. Alane contains 10.1 weight % hydrogen which meets the 2015 target set by the DOE of 9 weight % hydrogen. The decomposition of alane to its elements has no side reactions and has a decomposition enthalpy of 10 KJ/mol H2.  Thermal decomposition begins above 60 °C, but is slow. Decomposition studies have shown an ideal temperature range of 130 – 150 °C but with added dopant of TiCl3 or LiH decomposition can be achieved at an acceptable rate at <100 °C.  This, accompanied with recognition that rehydrogenation is realistic, makes alane a contender for use as an ideal hydrogen storage material.