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采用活性炭纤维为原料制备出膜/电容脱盐系统,提纯含氯化钠的水。OG系列活性炭纤维作为电极的活性材料,其比表面积和孔分布不同而呈现不同的活化程度。将这些材料用于膜/电容脱盐系统,评价了他们对钠离子或氯离子的脱盐性能。膜/电容实验在不同操作电位窗口、含盐溶液的进料速率和浓度下进行。OG系列活性炭纤维对每种离子的脱盐效率和电吸附量来评价膜/电容性能。结果表明,BET比表面积是确保高性能的必要因素。另外,炭材料最上端的浅孔有助于活性炭纤维比表面积的充分利用。OG7A样品的孔结构适合于钠离子吸附,OG10A和OG15A适于大量孔吸附氯离子。因此,非对称电极排列施加于吸附离子的尺寸,应考虑炭材料比表面积和孔面积的有效利用,以得到高性能的膜/电容脱盐系统。
Preparation of membrane / capacitor desalination system using activated carbon fiber as raw material to purify water containing sodium chloride. OG series of activated carbon fibers as the electrode active material, the specific surface area and pore distribution and showing different degrees of activation. Using these materials for membrane / capacitive desalination systems, they evaluated their desalination performance for sodium or chloride ions. The membrane / capacitance experiments were performed at different operating potential windows, feed rates and concentrations of saline solution. OG series of activated carbon fiber for each ion desalination efficiency and adsorption capacity to evaluate the membrane / capacitance properties. The results show that BET specific surface area is a necessary factor to ensure high performance. In addition, the carbon material at the top of shallow holes contribute to the full utilization of activated carbon fiber surface area. The pore structure of the OG7A sample is suitable for sodium ion adsorption, and OG10A and OG15A are suitable for adsorption of chloride ions in large numbers of pores. Therefore, the asymmetric electrode arrangement applied to the size of the adsorbed ions should take into account the effective utilization of the specific surface area and pore area of the carbon material in order to obtain a high performance membrane / capacitive desalination system.