The Performance and Mechanism of the Green Explosion Suppressant SGA for Coal Dust Explosion Suppression

Yansong Zhang; Kun Chen; Junjie Yang; Jinshe Chen; Zhichao Pan; Wenxi Shi; Xiangbao Meng; Xinyan Zhang; Min He

doi:10.1021/acsomega.1c04791

The Performance and Mechanism of the Green Explosion Suppressant SGA for Coal Dust Explosion Suppression

ACS Omega. 2021 Dec 14;6(51):35416-35426. doi: 10.1021/acsomega.1c04791. eCollection 2021 Dec 28.

Authors

Yansong Zhang^{1

2}, Kun Chen¹, Junjie Yang¹, Jinshe Chen^{1

2}, Zhichao Pan¹, Wenxi Shi¹, Xiangbao Meng^{1

2}, Xinyan Zhang^{1

2}, Min He^{1

2}

Affiliations

¹ College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
² Mine Disaster Prevention and Control-Ministry of State Key Laboratory Breeding Base, Shandong University of Science and Technology, Qingdao 266590, PR China.

Abstract

In recent years, coal processing is developing rapidly, but there are often hidden safety hazards such as coal dust explosions during coal processing. In order to ensure safe production and avoid coal dust explosion accidents, a carrier with unique micro-mesoporous structure (SG) based waste molecular sieves was prepared. After that, the carrier was loaded with (NH₄)₂C₂O₄(A) uniformly by ultrasound, which acted as an activity component for the first time. A novel micro-mesoporous coal dust explosion suppressant (SGA) is obtained. The law influence of different compositions of suppressant on the flame propagation of explosion was investigated. The results showed that the best ratio of waste molecular sieve, zirconium dioxide, and (NH₄)₂C₂O₄ of the suppressant is 1:7:2. The suppression performance increases with the increase of the addition of suppressant. When the addition amount is 70 wt %, the explosion loses the ability to continue to expand. Finally, combining the suppression performance with characterization results, the physical and chemical synergistic suppression mechanism is proposed, which reveals the reason why the suppressant has efficient suppression performance. The study could realize the green reuse of waste molecular sieves and provide guarantees for safe production of the coal processing industry.