Control and management for hydrogen energy systems without a catalyst

摘要

Magaesium reacted slowly with water to liberate 1 moles of hydrogen at room temperature after the formation of magnesium hydroxide on its surface. This study proposes a new method for continuously generating hydrogen gas in an aqueous sodium chloride solution by the hydrolysis of a waste magnesium sample. Hydrogen generation was accelerated by applying sodium chloride and some acids such as acetic acid. As the acetic acid increased and both of the rate and cumulative amount of hydrogen evolution increased. It was indicated that the hydrogen generation rates using acetic acid and sodium chloride were high compared with those using other platinum titanium net and stainless-steel net catalyzed, respectively. It seemed that a key was that use of the acetic acid in an aqueous sodium chloride solution, which was plenty of hydrogen ions producing a superior acid or neutral environment with the pH value less than 8.5 to prevent the formation of magnesium hydroxide. Magnesium hydroxide was a stabilized and insulated layer in an aqueous solution for continuously magnesium corrosion and releasing hydrogen ion at least 3.5% by weight of sodium chloride. Sodium chloride solution of waste magnesium samples can be applied as a hydrogen source. We found that the acetic acid worked as an excellent catalyst for releasing hydrogen from the sodium chloride solution of hydrolysis reaction.