By-products from the Al-water Reaction for Hydrogen Generation-Evolution and Properties

摘要

In this paper, the properties and evolution during the calcination process of hydrolysis by-products from the reaction between Al-based composites and water for hydrogen generation were systematically investigated. The results showed that the main phases of by-products included AlOOH and InSn4. The amorphous product possessed a large Brunauer-Emmett-Teller (BET) surface area with 276.77 m(2)/g and high porosity properties with 0.37 cm(3)/g. The phase transformation of by-products from AlOOH to gamma-Al2O3, delta-Al2O3, and alpha-Al2O3 occurred during the calcination process. It appears that the by-products can be used as raw materials for the preparation of Al2O3 with different crystal structures. Discussion on the properties and evolution of hydrolysis by-products are beneficial to product reuse and recovery. In this way, the cost reduction of hydrogen production via Al-water reaction can be realized, promoting the sustainable development of hydrogen production from Al-water reaction.