Hydrogen production using waste aluminium dross: from industrial waste to next-generation fuel
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Kuupäev
2019
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Ajakirja pealkiri
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Abstrakt
This article describes the production of hydrogen from white aluminium dross, an
industrial waste generated in the aluminium smelter plants. Hydrogen is generated by metal-water
reaction between aluminium and water in presence of alkalis like sodium hydroxide and
potassium hydroxide. Aluminium dross is described as a heterogeneous material with its major
constituents being metallic aluminium, alumina and other salt fluxes like NaCl and KCl. Utilizing
the metallic aluminium content entrapped in the matrix of alumina for the metal-water reaction
has been the driving force for the waste recycling and simultaneous hydrogen production. Bulk
aluminium dross was crushed and downsized. The finer fraction of the powdered aluminium dross
is used for the experiments. The effects of dross in the alkaline solution, temperature of the
solution and the time of the reaction were studied to understand the generation of hydrogen. The
alkaline solution breaks the protective layer of alumina and exposes the entrapped aluminium
content to water, thereby commencing the hydrogen liberation.
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aluminium dross, hydrogen, waste management, recycling, articles