Study on the Formulation and Coal-wetting Performance of AEO5/SLS Binary Foam Dust Suppressant
ZHANG Jiangshi1, LIU Pengcheng1, FANG Lei1, HAN Fangwei2,*, TONG Linquan1,3, LIU Jianguo4, LIANG Yunfei1, YANG Juan1
1 School of Emergency Management and Safety Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China 2 College of Safety Science and Engineering, Liaoning Technical University, Huludao 125105, Liaoning, China 3 Key Laboratory of Dust Hazard Engineering Protection, National Health Commission, Beijing 102308, China 4 School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
Abstract: To investigate the optimal binary foam ratio of fatty alcohol polyoxyethylene ether (AEO5) and sodium lauryl sulfate (SLS) for enhancing dust suppression performance, a combination of physical experiments and molecular simulations was employed to study the stability and wettability of the binary dust-suppressing foam. Foam stability and static contact angle measurements were used to evaluate the optimal ratio of the binary foam suppressant and its wetting performance on long-flame coal. Its effectiveness was further validated through practical engineering applications. Molecular dynamics (MD) and density functional theory (DFT) calculations were used to analyze intermolecular interactions, hydrogen bond properties, and electrostatic potential. The results show that the optimal AEO5/SLS ratio is 6∶30, under which the shortest defoaming time is 156 min, and the minimum static contact angle of the solution is 17.94°. The dust suppression efficiencies for total dust and respirable dust reached maximum values of 94% and 87%, respectively. Correlation analysis of experimental and molecular simulation results indicates that at the optimal ratio, the interaction energy between surfactant molecules and water molecules is maximized, resulting in the thickest foam liquid film and the highest stability. Additionally, under this ratio, the foam liquid film exhibits the lowest surface tension, providing more adsorption sites for water molecules when SLS molecules interact with long-flame coal molecules, thereby enhancing wettability. This study provides theoretical gui-dance for the development of novel multi-component foam dust suppressants.
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2025, Vol. 39 
