Study on the effects of a multi-surfactant composite solution on coal dust wettability

Rongxia Yu, Zhian Huang, Mingming Fu, Gaowen Wang, Hongsheng Wang, Jiaze Ren, Qianming Liu, Hao Ding, Keying Meng, Ruixiang Wang, Yongrui Yang, Ye Xu, Md Yasin and Asim Farooq

Energy, 2025, vol. 335, issue C

Abstract: Pneumoconiosis caused by coal dust contamination is still a damaging and highly prevalent occupational disease in coal mining. In order to reduce the dust concentration, a composite surfactant solution with strong wetting ability was derived in this study through surface tension (ST), contact angle (CA), setting tests and response surface experiments. And molecular dynamics simulation (MDS) was utilised to study the wetting effect of the optimal compounding system from a microscopic perspective. The results of the ST, CA, and setting tests showed that the nonionic octylphenol-10 (OP-10), cationic cetyltrimethylammonium bromide (CTAB), and amphoteric cocamidopropyl betaine (CAB) had the best wetting effects. The optimum ratio, OP-10:CAB:CTAB = 0.12 %:0.23 %:0.5 %, was obtained from the response surface experiment, in which the ST was 29.79 mN/m, the CA was 20.55°, the penetration time was about 20 min. There was a substantial improvement in wetting performance compared to a single solution at the same concentration. The MDS results showed that the synergistic effect of CTAB and CAB reduced the adsorption energy by 38.46 kcal/mol and increased the penetration depth of water molecules by 2.6 Å, which effectively enhanced the wettability of coal dust.

Keywords: Coal dust control; Surfactant; Response surface experiment; Molecular dynamics simulation (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:335:y:2025:i:c:s0360544225036576

DOI: 10.1016/j.energy.2025.138015

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