Capacitive desalination is a very promising method for the supply of high-tech industrial water in the future. In this study, activated carbon with both specific surface area and mesopores developed at the same time was prepared by preliminarily oxidized petroleum coke with hydrogen peroxide and then activating it with KOH. Hydrogen peroxide used for preliminary oxidation penetrates deep to the inside as well as the surface of petroleum coke to increase reactivity upon activation, forming pores to the depth of petroleum coke to create high specific surface area activated carbon with developed mesopores. Activated carbon prepared by preliminarily oxidized petroleum coke had high specific surface area and mesopores. In particular, OMC-35 had a specific surface area of 3032 m²/g and the highest mesopores of 0.82 cm³/g. As a result, OMC-35 had an excellent capacitance of 196.9 F/g at a scan rate of 5 mV/s. In addition, OMC-35 showed a salt adsorption capacity (SAC) of 19.5 mg/g and excellent desalination performance with a salt removal efficiency of 98.5 % in 250 ppm of NaCl solution. Thus, this work supports OMC-35 as a promising candidate for desalination of industrial water and large-scale application.

电容式海水淡化是未来非常有前景的高科技工业用水供应方式。本研究将石油焦先用过氧化氢氧化，再用KOH活化，制备出比表面积和中孔同时发育的活性炭。用于初步氧化的过氧化氢深入渗透到石油焦内部和表面，提高活化时的反应性，在石油焦深处形成孔隙，形成具有发达中孔的高比表面积活性炭。石油焦经初步氧化制备的活性炭具有较高的比表面积和中孔。特别是 OMC-35 的比表面积为 3032 m ²/g和0.82 cm ³ /g的最高中孔。因此，OMC-35 在 5 mV/s 的扫描速率下具有 196.9 F/g 的出色电容。此外，OMC-35 表现出 19.5 mg/g 的盐吸附容量 (SAC) 和出色的脱盐性能，在 250 ppm NaCl 溶液中的盐去除效率为 98.5 %。因此，这项工作支持 OMC-35 作为工业水淡化和大规模应用的有希望的候选者。