树脂基活性炭球的制备及其二苯并噻吩吸附性能

Preparation of Activated Carbon Spheres and Their Adsorption Ability to Dibenzothiophene

采用间乙基苯酚和甲醛为反应单体，乙二醇和聚乙二醇为添加剂，利用悬浮聚合和水蒸气活化制备出不同孔结构的活性炭球。通过场发射扫描电子显微镜和孔结构全自动物理吸附仪对样品的形貌和结构进行表征分析；并采用含有二苯并噻吩的正辛烷溶液作为模型油，对所制备的活性炭球的二苯并噻吩吸附性能进行评价。结果表明：添加乙二醇和聚乙二醇提高了活性炭球的比表面积和孔客，改善了活性炭球的孔结构，活性炭球的最高比表面积和总孔容分别为1504m^2／g和0.71cm^3／g；活性炭球对二苯并噻吩的吸附容量增加，孔径为0.6-1.2nm的孔容对二苯并噻吩吸附能力起决定作用。

Activated the addition of ethylene carbon spheres were prepared from 3-ethylphenol and formaldehyde by glycol and polyethylene glycol via suspension polymerization and steam activation. The surface morphology and texture properties of the obtained activated carbon spheres were characterized by N2 adsorption-desorption and scanning electron microscope; the dibenzothiophene adsorption properties were investigated by model oil （dissolving DBT in noctane）. The results were as follows： after the addtion of ethylene glycol and polyethylene glycol, the surface area and total pore volume of activated carbon spheres increased markedly, and pore strcture was enhanced. The as-prepared activated carbon spheres reached a surface area value as high as 1504m^2/g and a total pore volume of 0.71cm^3/g. The dibenzothiophene adsorption capacities of activated carbon spheres increased, and the volume of micropores （0.6-1.2nm） played an important role in adsorption capacity.