无机胶凝成型活性炭的制备及性能研究

Research on preparation and performance of activated carbon monoliths with inorganic cement binder

用水泥熟料作胶凝剂,探讨粉末活性炭的成型及性能。通过引入硅微粉与采取蒸压养护措施提高材料强度、缩短制备周期;用扫描电子显微镜(SEM)观察微观形貌,用抗压强度、碘吸附值、气孔率、吸水率、含炭量等指标评价试样的综合性能。研究结果表明,将70%(质量分数)活性炭粉末、25%(质量分数)水泥熟料粉末与5%(质量分数)硅微粉充分混合均匀后,造粒、成型,在195℃蒸压釜中养护6h,可制得性能良好的无机胶凝成型活性炭材料;试样的物理性能:碘吸附值为551.72mg/g,抗压强度为7.25MPa,炭含量为58.48%,气孔率为57.34%,吸水率为69.42%。

Cement clinker as inorganic cement binder was used to explore the forming and properties of powder activated carbon. Adding silicon micro powder and using steam pressure curing in the process for improving the strength of the materials and shortening sample preparation cycle. The scanning electron microscopy （SEM）, compressive strength, iodine adsorption value, the porosity, water absorption, carbon content were used to in- testigate the microstructures and the properties of activated carbon monoliths. The results show that 70wt% of activated carbon, 25wt% of cement clinker and 5wt% of silica powder were mixed, granulated, and molded, and then steam pressure curing at 195 ℃ for 6h would provide a new path of getting the good properties of acti- vated carbon monoliths; the corresponding properties of the optimal samples are listed below： the iodine ad- sorption value was 551.72rag/g, and the compressive strength was 7.25MPa. The carbon content of 58.48% ; the porosity was 57.34%, water absorption was 69.42%.