From the can to the tank: NaAlH4 from recycled aluminum

The recycling of Al-cans (from soft beverages cans) by a ball milling process and its use as a main component of a hydrogen storage material is presented. The recycled Al, together with NaH, TiF3 as the catalyst, and C-nanotubes as milling agent were milled together as precursors of NaAlH4. The material presented a reversible hydrogen storage capacity of 3.7 wt% at 150 °C and up to 100 bar hydrogen pressure. Characterization of the as-milled and...