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以煤系高岭土为原料,通过插层反应,成功制备了高岭土纳米管,管的内径为8~25 nm,长度为0.1~0.5μm,长径大,均一性好。选用3种季铵盐表面活性剂:十六烷基三甲基氯化铵(CTAC)、十六烷基三甲基溴化铵(CTAB)和十二烷基三甲基溴化铵(DTAB)对高岭土纳米管进行改性,考察了不同种类、不同浓度的表面活性剂分子对高岭土纳米管结构和吸附脱硫性能的影响。结果表明,经过表面活性剂改性后高岭土纳米管的吸附脱硫能力有所增强,尤其以0.5 mol/L CTAC甲醇溶液改性后,高岭土纳米管的脱硫率有明显增加,从原来40.5%增加到60.3%。
Kaolinite nanotubes were successfully prepared by intercalation reaction using coal kaolinite as raw material. The inner diameter of the tube is 8-25 nm, the length is 0.1-0.5 μm, the major diameter is large, and the uniformity is good. Three kinds of quaternary ammonium surfactants were selected: cetyltrimethylammonium chloride (CTAC), cetyltrimethylammonium bromide (CTAB) and dodecyltrimethylammonium bromide (DTAB ) Modified kaolin nanotubes to investigate the different types and concentrations of surfactant molecules on the kaolin nanotube structure and adsorption desulfurization performance. The results showed that the kaolinite nanotubes adsorbed on the surface of the adsorbent had better desulfurization ability. Especially the desulfurization rate of kaolinite nanotubes increased significantly from 40.5% to 0.5 mol / L CTAC methanol solution 60.3%.