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以大同煤为主要原料,通过配煤,采用物理活化法对活性炭的孔隙结构进行调控,制备得到活性炭。采用氮气吸附仪测定了不同烧失率活性炭的吸附脱附等温线,并通过BET方程和QSDFT函数理论对活性炭孔结构进行表征,其结果与扫描电镜分析的活性炭微观结构一致。研究显示,在烧失率为70.2%和80.5%的条件下制备得到了中孔率分别为37.2%和48.0%的活性炭产品,为煤基中孔活性炭的工业化生产提供了理论与实践依据。
Taking Datong coal as main raw material, the pore structure of activated carbon was regulated by physical activation method through coal blending, and activated carbon was prepared. The adsorption and desorption isotherms of activated carbon with different burning-off rates were determined by nitrogen adsorption. The pore structure of activated carbon was characterized by BET equation and QSDFT function theory. The results were consistent with the microstructure of activated carbon by scanning electron microscopy. The results showed that activated carbon products with mesoporosity of 37.2% and 48.0% were prepared at 70.2% and 80.5%, respectively, which provided theoretical and practical basis for the industrial production of coal-based mesoporous activated carbon.