Using a solution of the surfactant for increasing collection efficiency of coal dust in the exhaust system

Solodyankin, S. S.; Kolmakov, N. G.; Manin, N. S.; Fritsler, V. K.; Kazantsev, A. V.; Miroshnikov, A. M.

doi:10.3103/s1068364x16090088

Cited by 3 publications

(2 citation statements)

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“…Among bituminous coals, long-flame coals show the strongest wettability, while coking coals show relatively stronger hydrophobicity, i.e., their wettability is weaker [18]. Referring to previous studies, the addition of surfactants to the dust removal system can substantially improve the dust removal efficiency [19]. Based on contact angle experiments and reverse osmosis experiments to study the effect of surfactant concentration on the contact angle and dust removal efficiency of coal dust, it was found that with an increase in surfactant concentration, the wettability of coal dust was enhanced [20].…”

Section: Introductionmentioning

confidence: 77%

Research on Mechanism of Surfactant Improving Wettability of Coking Coal Based on Molecular Dynamics

Liu,

Li,

Ling

et al. 2024

Processes

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Coal dust is a major safety hazard in the process of coal mining and is of great importance to ensure production safety and maintain the health of operators. In order to understand the microscopic mechanism during coal seam water injection and reveal the mechanism of surfactants in improving the wettability of coal dust, coking coal was selected as the research object. Three surfactants, SDBS, AEO-9, and CAB-35, were chosen for molecular dynamics simulation research on the wetting and adsorption properties of water/coal/surfactants. The results show that surfactant molecules can cover the hydrophobic groups on the surface of coking coal, forming a hydrophilic adsorption layer, changing the coal surface from hydrophobic to hydrophilic, and enhancing the wettability. After adding surfactants, the thickness of the adsorption layer in the z-axis direction increases, expanding the contact area between coking coal and water molecules, thereby improving the wettability. When surfactants tightly cover the surface of coking coal, their binding strength increases, forming a more stable hydrophilic layer and further improving the wettability. At the same time, surfactants promote the diffusion of water molecules and enhance the interaction between hydrophobic alkyl chains and water molecules, further enhancing the wetting effect.

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Section: Introductionmentioning

confidence: 77%

Research on Mechanism of Surfactant Improving Wettability of Coking Coal Based on Molecular Dynamics

Liu,

Li,

Ling

et al. 2024

Processes

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“…In order to improve the efficiency of dust control methods, the addition of surface active materials to the water solution has become a common approach in the field of dust precipitation . Wang et al studied that the addition of a certain surfactant can effectively reduce the surface tension of the solution and form an adsorption structure on the surface of coal dust, thereby changing the wettability of the coal.…”

Section: Introductionmentioning

confidence: 99%

Effect of SDBS solution on the surface potential properties of the Zhaozhuang coal

Meng

Xia

et al. 2020

Surface & Interface Analysis

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It is of great significance to study the effect of surfactants on the coal surface potential for effective dust suppression in mining faces. The effect of different concentrations of sodium dodecyl benzene sulfonate (SDBS) solution on the surface potential of the Zhaozhuang coal was measured by atomic force microscopy (AFM). The experimental results show that the SDBS solution has significant influence on the surface potential of the Zhaozhuang coal. The electrical characteristics of the coal surface at the nanometer scale are different from those of macroscopic or the mesoscopic level.The surface potential of coal is basically a normal distribution, showing certain electrical characteristics. The mean value of the surface potential of the Zhaozhuang coal is increased with the increase in concentration of the SDBS solution; when the concentration of the SDBS solution is 0.3%, the mean value of surface potential is 5.59 mv, which is about two times of the mean value of the surface potential without SDBS solution added. With the increase of the concentration of the SDBS solution, the maximum value of the surface potential of the Zhaozhuang coal increases, and the minimum value decreases. It shows that the SDBS solution has a significant effect on the potential distribution law and the magnitude of the coal surface. Subsequently, on the basis of the constructed Zhaozhuang coal macromolecule model, xtb and Multiwfn simulation software were used to calculate the molecular surface electrostatic potential value and electron density value of the Zhaozhuang coal molecules after adding water molecules. The variation law for the electrostatic potential surface of the molecule was obtained after adding numbers of water molecules to the surface of the coal molecule. The simulation results show that the area proportion of absolute molecular surface electrostatic potential greater than 10 kcal/mol is increased with the growth in the number of water molecules, while the area proportion of absolute molecular surface electrostatic potential less than 10 kcal/mol is decreased.Because of the free state O─H bond polarity of water molecules, the charges on the molecular surface are rearranged in order to change the electron density on the surface of coal molecules, which affects the overall electrostatic potential of the configuration. K E Y W O R D S atomic force microscopy (AFM)

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Influence of alkyl polyglucoside and fatty alcohol ether sulfate on the foaming and wetting properties of sodium dodecyl benzene sulfonate for mine dust control

Wang

et al. 2019

Powder Technology

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Using a solution of the surfactant for increasing collection efficiency of coal dust in the exhaust system

Cited by 3 publications

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Research on Mechanism of Surfactant Improving Wettability of Coking Coal Based on Molecular Dynamics

Research on Mechanism of Surfactant Improving Wettability of Coking Coal Based on Molecular Dynamics

Effect of SDBS solution on the surface potential properties of the Zhaozhuang coal

Influence of alkyl polyglucoside and fatty alcohol ether sulfate on the foaming and wetting properties of sodium dodecyl benzene sulfonate for mine dust control

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