Hydrogen Production from Aluminium–Water Reactions: Thermodynamic Properties Analysis
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Abstract
Hydrogen production from low price materials at moderated temperature should be developed for sustainable commercial production. The aluminium and water reaction at low temperature is very attractive because it can generate hydrogen without a reactor operating at high temperature and pressure required. The hydrogen production process by hydrolysis reactions of aluminium with NaOH in different types of water was studied. It was aimed at better understanding on how the Cl ions in different types of water affect the hydrolysis at the different reactions for the hydrogen production. It was observed that the ionic strength of the solutions strongly increased with the Cl ions and aluminium mass added. However, simultaneous effect resulted in the coefficient of lower hydroxide ions (OH-) activities. The activities of the hydroxide ions at the employed conditions of the reactions were calculated using Aspen PlusTM. NaOH additives dissolved in water, produced hydroxyl ions and consequently promoted the hydrolysis reactions between aluminium and water. The maximum hydrogen generated was 583 ml as obtained from the reaction of 1 g aluminium in 30 ml distilled water for 30 min.
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References
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