Investigation of the impact of sodium dodecylbenzene sulfonate modification on the wettability of coking coal

ABSTRACT

To investigate the impact of sodium dodecylbenzene sulfonate (SDBS) modification on coking coal’s wettability, our research focuses on coking coal and uses SDBS as the surfactant in the experiment. The surface tension, scanning electron microscope, FTIR, contact angle measurement, and reverse osmosis experiment are employed to measure the microscopic characteristics and wettability of raw coking coal, water-soaked coal, and coal soaked in 0.0005%, 0.005%, and 0.05% SDBS solutions. Finally, the dust reduction efficiency was determined by spray dust reduction experiments. We analyzed the effect of varying mass fractions of SDBS on coking coal’s wettability. The findings indicate that the surface of coal samples soaked in water and SDBS solution become rough. Adding clean water and SDBS solution improves the coal samples’ wettability. Among various coal samples soaked in different solutions, the one treated with 0.005% SDBS solution exhibits the smallest contact angle, significantly higher moisture absorption, and the most pronounced wetting effect. Soaking the coal samples in 0.005% SDBS solution can achieve the highest dust reduction efficiency. In summary, soaking the coal samples in no matter clean water or SDBS solution can enhance the wettability of coal dust, while soaking in 0.005% SDBS solution has a better effect.

KEYWORDS:

• Surfactant
• wettability
• scanning electron microscope
• FTIR
• contact angle
• reverse osmosis experiment

Disclosure statement

No potential conflict of interest was reported by the author(s).

Author contribution

Yuping Ling: methodology, validation Investigation, data curation and writing-original draft.

Yan Cui: formal analysis and review.

Pengfei Wang: Conceptualization and writing- review and editing.

Shiqiang Chen: visualization and review.

Shilin Li: visualization and review.

Additional information

Funding

This research was financially supported by Nation Natural Science Foundation of China [52274197], Huxiang Youth Talent Support Program [2021RC3111], Natural Science Foundation of Hunan Province [2021JJ30266].

Notes on contributors

Yuping Ling

Yuping Ling Postgraduate student, research direction is dust control.

Yan Cui

Yan Cui Ph.D., Lecturer, research direction is dust control.

Pengfei Wang

Pengfei Wang Ph.D., professor, research direction is industrial ventilation and dust control.

Shiqiang Chen

Shiqiang Chen Ph.D., Professor, research direction is underground space ventilation.

Shilin Li

Shilin Li Ph.D., Associate professor, research direction is working environment safety.