Molecular simulations and experiments on the effect of different types of surfactants on the wetting properties of bituminous coal

Currently spray dust reduction is one of the most widely used dust removal methods in coal mines. The wetting performance of water on coal has a direct impact on spray dust reduction, therefore, adding wetting agents such as surfactants in water can improve the wetting performance of water on coal. In order to investigate the effect of various surfactants on the wettability of bituminous coal dust, four types of surfactants, namely, Rapid Penetrant T, 1227, BS-12 and APG, were used to investigate the wettability of bituminous coal by combining molecular simulation techniques and laboratory experiments. On the one hand, the interfacial system of surfactant aqueous solution was constructed by means of molecular simulation, the hydrophilicity of surfactant itself was analyzed based on the theory of the number of hydrogen bond formation and the radial distribution function, and the surface tension experiments of 4 reagents were carried out, and it was found that the Rapid Penetrant T reagent forms the most number