Selection of reagent ratio for hydrogen production via Al nanopowder oxidation

Abstract

Abstract In the present paper, Al is considered as a basic material for hydrogen production from water because of its high performance, availability, and environmental safety of its reaction products. Here we report the results of experimental trials on the oxidation of Alex-grade Al nanopowder by water when heated and stirred. The plots of pressure and temperature versus Al oxidation time in a high-pressure reactor are given. We show the advantages of hydrogen extraction from hydrogen-containing materials via the oxidation of metal powders. An optimum mass ratio of Al nanopowder to water at which the oxidation reaction takes place to release hydrogen has been identified by varying the reagent ratio. It can be concluded at this point of the study that it is advisable to maintain the H2O-to-Al nanopowder ratio of 11:1 for hydrogen production. Hydrogen resulted from this reaction can be used to supply small-scale power packs based on hydrogen FC.