负载型离子液体溴代正丁基吡啶/活性炭吸附SO2

离子液体溴代正丁基吡啶通过等体积浸渍法负载到活性炭(AC)上(BPy]Br/AC)，对N2/SO2组成的模拟烟气(SO2浓度为3300 mg/m3)进行吸附，对SO2的吸附容量达49.5 mg/g. BPy]Br/AC再生后的二次吸附率达96.83%，可重复利用. 孔结构特征测定结果显示，负载使AC总孔容的增加主要发生在4 nm以下，特别是0.5~3 nm的微孔范围内；吸附后，BPy]Br/AC吸附剂的微孔孔容减少了29.5%，表面积减少了47.5%.

Adsorption Performance of Ionic Liquid [BPy]Br Immobilized on Activated Carbon to SO2

The ionic liquid BPy]Br was immobilized onto activated carbon (AC) via a facile incipient impregnation method. The SO2 adsorption/desorption performances of the immobilized ionic liquid were evaluated, and high SO2 adsorption capacity and rate achieved. Its capacity reached 49.5 mg/g with a N2/SO2 mixture gas containing 3300 mg/m3 SO2. The BPy]Br/AC system could be reused for many adsorption/desorption cycles. The second adsorption rate reached 96.83%. The immobilized IL structure was determined. The immobilization resulted in the increase of the volume of pores small than 4 nm, the most noticeable change was in the size range of pores from 0.5 to 3 nm. After adsorption, the surface area decreased 47.5% with 29.5% decrease in the volume of microspores.