表面活性剂对无烟煤煤尘的抑尘效果研究
Study on dust suppression effect of surfactant on anthracite coal dust
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摘要: 研究了脂肪醇聚氧乙烯醚（AEO9）、十二烷基硫酸钠（SDS）和十二烷基三甲基溴化胺（DTAB）3种表面活性剂溶液对晋城无烟煤呼吸性粉尘的抑尘效果。在临界胶束质量分数（CMC）下，利用悬滴法和座滴法分别测定了表面活性剂溶液的动态表面张力和在无烟煤表面的动态接触角；利用分子动力学模拟研究了表面活性剂与无烟煤的吸附强度、胶束的稳定性以及单分子在水中的扩散系数。实验结果表明：AEO9溶液对煤尘的降尘效果最好，SDS次之，DTAB最差；在临界胶束质量分数（CMC）以上，悬滴平衡态表面张力值依次是AEO9Abstract: In this paper, the dust inhibition effect of fatty alcohol polyoxyethylene ether（ＡＥＯ9）, sodium dodecyl sulfate（ＳDＳ） and dodecyl trimethylamine bromide（DＴＡＢ） on respirable dust from Jincheng anthracite was studied. The dynamic surface tension of the surfactant solution and the dynamic contact angle on the surface of anthracite were measured by hanging drop method and pedicle drop method at CMC concentration; the adsorption strength of the surfactant and anthracite, the stability of the micelle and the diffusion coefficient of the single molecule in water were studied by molecular dynamics simulation. Experimental results show that AEO9 solution has the best dust reduction effect on coal dust, followed by SDS and DTAB the worst. Above the critical micelle concentration（ＣＭＣ）, the equilibrium surface tension of the hanging drop is AEO9
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Keywords:
- surfactant /
- wettability /
- dust reduction /
- micellar dissociation /
- molecular dynamics /
- dust suppression /
- dust control
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