负载金属球形活性炭的制备及其噻吩吸附性能

以122型酚醛型弱酸性阳离子交换树脂为原料，首先进行阳离子交换，然后经炭化-活化制备了负载Ag、Cu和Ni等金属的球形活性炭材料，所得材料的孔结构和负载金属的形态分别采用低温N2吸附、X射线衍射和扫描电镜等方法进行了表征，结果表明制备的负载金属球形炭材料中金属以单质颗粒的形态存在，而其比表面积和孔容比未负载的材料略为下降。以噻吩-环己烷模拟溶液为考察对象，采用动态吸附方法，以穿透硫容为考察指标，评价了材料的吸附脱硫性能，并初步分析了其吸附机理。负载的球形炭材料的穿透硫容为1.46 mg•g^-1，而负载Ag、Cu和Ni金属颗粒的球形炭材料的穿透硫容分别提高到3.66、4.43、5.07 mg•g^-1。

Synthesis of spherical activated carbon loaded with metal particles and its performance of thiophene adsorption

Spherical activated carbons supported with elemental Ag, Cu, and Ni were synthesized by cation exchange of type 122 phenolic cation exchange resin followed by carbonization and activation.The pore structure and the metal loading state of the activated carbons were characterized with N₂ adsorption, X-ray diffraction (XRD), and scanning electron microscope (SEM), respectively.Characterization results showed that metals in the activated carbons existed in elemental form, and the specific surface area and pore volume of the activated carbons decreased slightly compared with unsupported activated carbon.The desulfurization performance of the activated carbons was evaluated by adsorptive removal of thiophene from thiophene-cyclohexane binary solution with breakthrough sulfur capacity as the criterion for evaluation.The adsorption mechanism of thiophene on these activated carbons was discussed.The adsorption experimental results showed that the breakthrough sulfur capacity of Ag, Cu, and Ni loaded spherical activated carbons were 3.66，4.43 and 5.07 mg•g^-1, respectively, in contrast with 1.46 mg•g^-1 for unsupported carbon.