The influence of surfactant on the wettability of coal dust and dust reduction efficiency

Yang, Lin; Ge, Shaocheng; Huang, Zhi‐Zhen; Jing, Deji; Chen, Xi

doi:10.1007/s12517-021-07570-w

Cited by 14 publications

(5 citation statements)

References 5 publications

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“…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]. When the surfactant concentration increases to the critical micelle concentration, the wetting effect of the solution on coal dust reaches its optimum state.…”

Section: Introductionmentioning

confidence: 80%

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: 80%

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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“…This is particularly significant in the context of spray dust suppression solutions, as many chemical surfactants have been applied to tackle the pollution problems caused by respirable and hydrophobic dust in recent years. These surfactants can change the surface tension and viscosity of the spray solution [14][15][16], making it essential to investigate the influence of these properties on the atomization effect to improve dust suppression efficiency.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Investigation of the Impact of Surface Tension and Viscosity on the Atomization Effect of a Solid Cone Nozzle

Yang

Wang

et al. 2023

Applied Sciences

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To investigate the influence of surface tension and viscosity on the atomization performance of solid cone nozzles and improve their dust reduction efficiency in industrial and mining enterprises, this study employed a self-built PDPA dust-fog coupling experimental system to explore the effects of different surface tension and viscosity solutions on atomization performance from three aspects: axial, radial, and fog field distribution. The experimental results indicate that compared with surface tension, surface tension has a greater influence on droplet size and velocity in the axial direction. In the radial direction, increasing surface tension and reducing viscosity within a certain range can make the droplet size and velocity distribution more uniform. Additionally, surface tension and viscosity significantly affect the fog field distribution. It was found that a decrease in surface tension can result in a closer proximity of the droplet velocity and size expansion area to the nozzle, while an increase in viscosity can lead to a more prolonged stable area. Furthermore, optimizing the surface tension and viscosity can significantly enhance the efficacy of dust reduction for respirable dust. Consequently, the application of the aforementioned atomization principles to regulate the fog field characteristics of solid cone nozzles can effectively mitigate dust in the production process and augment the dust reduction rate of industrial and mining enterprises.

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“…12−14 So far, many researchers have studied the influence of various wetting agents on the wettability of coal through static experiments. 15 Yan et al 16 used a contact angle measuring instrument to determine the wettability of different compound surfactants. Then, the preferred surfactants were compounded with chemically modified sodium alginate to prepare an environmentally friendly coal dust wetting agent.…”

Section: Introductionmentioning

confidence: 99%

“…So far, many researchers have studied the influence of various wetting agents on the wettability of coal through static experiments . Yan et al used a contact angle measuring instrument to determine the wettability of different compound surfactants.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Molecular Dynamics Simulation Study for Preferring Coal Dust Wetting Agents

Sun

Liu

et al. 2022

ACS Omega

Self Cite

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To improve the efficiency of coal dust removal by water spray technology, the addition of wetting agents in water becomes the main dust removal method. The influence of sodium dodecyl sulfate (SDS), sodium dodecyl sulfonate (SDDS), and sodium dodecylbenzene sulfonate (SDBS) on the wettability of coal dust is studied by experimental and molecular dynamics (MD) simulation. Measurement of the contact angle and surface tension was accomplished via relevant experiments for the three wetting agents, and their adhesion work, spreading work, and wetting work were also calculated. A preferred experimental method of conventional coal dust wetting agent is optimized. The wettability of the three wetting agents upon bituminous coal follows the trend: SDS > SDDS > SDBS. The simulation was performed based on MD to derive the intermolecular interaction energy, diffusion coefficient of water molecules, and water molecule count in the vicinity of the hydrophilic groups of the wetting agents. The wetting mechanism and performance of the wetting agent solution on bituminous coal were identified. The simulation results of the wetting performance of the wetting agents are consistent with the experimental results, which verifies the reliability of the simulation method. An easy, time-saving, and labor-saving MD simulation method is proposed, which provides a novel insight for choosing various wetting agents of coal dust.

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The influence of surfactant on the wettability of coal dust and dust reduction efficiency

Cited by 14 publications

References 5 publications

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

An Experimental Investigation of the Impact of Surface Tension and Viscosity on the Atomization Effect of a Solid Cone Nozzle

Experimental and Molecular Dynamics Simulation Study for Preferring Coal Dust Wetting Agents

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