Dispersion of Aluminum in Pulsed Discharges

R.K. Bayramov, LLC. "Olympia" Novomoskovsk, st. Transportnaya, 26, 301650, Tula region, Russia

*Corresponding author: Ramiz K Bayramov, R.K. Bayramov, LLC. "Olympia" Novomoskovsk, st. Transportnaya, 26, 301650, Tula region, Russia, E-mail: [email protected]

Received Date: July 18, 2024

Publication Date: November 01, 2024

Citation: Bayramov RK. (2024). Dispersion of Aluminum in Pulsed Discharges. Catalysis Research. 4(1):19.

Copyright: Bayramov RK. © (2024).

ABSTRACT

The works available in the literature, including our own, were analyzed, on the basis of which this review article was prepared. A study of the process of aluminum dispersion in pulsed discharges in aqueous solutions has established that the main products obtained during the dispersion process are two aluminum hydroxides (bayerite and boehmite structures) and metal powder. It has been shown that bayerite aluminum hydroxide (AН) is obtained by dispersing the metal in pulsed discharges in distilled water, and boehmite AН - in weak solutions of nitric acid salts and some organic compounds. When the metal is dispersed in weak solutions of inorganic and organic acids, the process produces dispersed aluminum powder (crystallites have a spherical shape with a diameter of 20-60 nm). The influence of the nature and concentration of the components of the working solution, the temperature and exposure time of the pulp (a mixture of the working solution and dispersed metal), and the frequency of current pulses supplied to the electrodes on the formation of the product composition was studied. It has been shown that atomic oxygen (AO), formed during the thermal decomposition of the components of the working solution, plays an important role in the formation of the final products. It has been revealed that in the process of dispersing aluminum in weakly acidic solutions, the resulting thermal decomposition of AO forms a protective oxide film on the surface of the dispersed metal particles, protecting the dispersed metal from interaction with the environment. In this case, the result is a metal powder that does not have pyrophoric properties. A mechanism for obtaining aluminum dispersion products is proposed.

Keywords: Dispersion, Aluminum Hydroxide, Metal Powder, Atomic Oxygen, Pulsed Discharge