负载型离子液体溴代正丁基吡啶/活性炭吸附SO_2  

Adsorption Performance of Ionic Liquid [BPy]Br Immobilized on Activated Carbon to SO_2

作　　者：田晋平[1,2] 闻立静[2] 吕永康[1] 李秉正[2] 马燕[2] 

机构地区：[1]太原理工大学化工学院,山西太原030024 [2]太原科技大学材料科学与工程学院,山西太原030024

出　　处：《过程工程学报》2012年第2期223-226,共4页The Chinese Journal of Process Engineering

摘　　要：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3300mg/m3)进行吸附,对SO2的吸附容量达49.5mg/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4nm以下,特别是0.5～3nm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%.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 3 300 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 microsoores.

关 键 词：负载型离子液体 SO2 吸附剂 吸附 脱附 活性炭 

分 类 号：X511[环境科学与工程—环境工程]