Hydrolysis acceleration in an Al-Ga-Gr particle material utilizing ultrasound irradiation

Haijun Huang

doi:10.1016/j.ultsonch.2020.105064

Hydrolysis acceleration in an Al-Ga-Gr particle material utilizing ultrasound irradiation

Ultrason Sonochem. 2020 Jul:65:105064. doi: 10.1016/j.ultsonch.2020.105064. Epub 2020 Mar 20.

Author

Haijun Huang¹

Affiliation

¹ Shanghai Key Lab of Advanced High-temperature Materials and Precision Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China. Electronic address: cornus@sjtu.edu.cn.

PMID: 32203921
DOI: 10.1016/j.ultsonch.2020.105064

Abstract

The improvement of the hydrogen production rate and the hydrogen conversion ratio is crucial for hydrogen acquirement via Al-water reactions. Present work fabricated an Al-Ga-Gr hydrolyzing particle material, and presents the accelerated hydrolysis by ultrasound irradiation to achieve a high speed of hydrolysis and 100% yield within a short time, and provides a weak coupling model to address the acoustic pressure, velocity and thermal fields in the reactor. The obtained material is characterized with lamellar morphologies comprising AlGa solid solution and Gr. The hydrolysis is accelerated within the cavitation region by peeling off the reaction by-product layer to expose fresh aluminum, and deteriorates after the particle material traversing the cavitation/non-cavitation region boundary. Ultrasound promotes the hydrolysis progress from a diffusion governed mode to a dominated regime of interface reaction without a change to the activation energy.

Keywords: Al-water reaction; Graphene; Hydrogen; Hydrolysis; Ultrasound.