Synthesis of green nanomaterial and discussion on its suppression performance and mechanism to aluminum dust explosion

In order to develop a green and efficient nano suppressant for aluminum (Al) dust explosion, MCN with layered structure was synthesized with low-cost urea as precursor via simple calcination technology. The suppression performance of MCN on the flame propagation of 30 mu m and 5 mu m Al dust with the concentration of 1000 g/m(3) was experimentally studied. Results showed that with the addition of MCN increasing, the flame luminous intensity, flame propagation velocity and fluctuating trend of mixture-Al dust were greatly decreased. After adding 500 g/m(3) and 700 g/m(3) to 30 mu m and 5 mu m Al dust, the average flame propagation velocities declined by 73.24 % and 94.07 % separately. The minimum inerting concentration of 30 mu m and 5 mu m Al dust was 600 g/m(3) and 900 g/m(3). Explosion residuals were analyzed to further reveal the suppression mechanism of MCN in detail. The good performance of MCN provided a potential direction to develop efficient suppressants on the suppression of Al dust explosions to improve process safety. (C) 2021 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.

Automated summary

The experimental results show that MCN can significantly reduce the flame propagation speed and intensity of aluminum dust, providing a potential direction for developing efficient suppressants for aluminum dust explosions.