Using sodium D-gluconate to suppress hydrogen production in wet aluminium waste dust collection systems

The reaction of aluminium dust and water generated in the production of aluminium products generates hydrogen, which poses a risk to wet collection systems for hydrogen explosions. In this paper, non-toxic and environmentally friendly sodium D-gluconate is used to suppress the hydrogen production reaction of aluminium waste dust and water. The results of the hydrogen evolution curves and chemical kinetics of 7 different concentrations of sodium D-gluconate showed that when the sodium D-gluconate concentration reached 0.25 g L^-1, there was almost no hydrogen generation, and the rate constant was almost zero. The scanning electron microscopy (SEM) results showed that the surface of the reaction product became smoother with increasing solution concentration. The energy dispersive spectroscopy (EDS) results showed that increasing the solution concentration slowed the formation of aluminium oxide in the product, confirming the effectiveness of sodium D-gluconate in inhibiting the reaction of aluminium waste dust particles with water. The Fourier transform infrared (FTIR) results showed that sodium D-gluconate formed a chemical adsorption film on the surface of aluminium waste dust particles to prevent the dust from contacting water, thus suppressing hydrogen production. This method provides a new approach to design safe wet collection systems by suppressing hydrogen production.