硅胶负载离子液体的CO_2吸附性能影响因素研究  

Study on Factors Influencing CO_2 Adsorption on Ionic Liquid-immobilized Silica Gel

作　　者：董晓晨[1] 朱佳媚[1] 孙雅钗[1] 钟昌祥 

机构地区：[1]中国矿业大学化工学院,徐州221116

出　　处：《材料导报》2015年第14期77-81,共5页Materials Reports

基　　金：中央高校基本科研业务费专项资金(2012QNA16);江苏省大学生实践创新训练计划(201410290036X)

摘　　要：采用浸渍法将两种离子液体负载在A型和B型硅胶上,研究了硅胶种类和活化温度、离子液体种类和负载量、吸附剂孔径分布（PSD）等对CO2吸附效率的影响。结果表明,制得的吸附剂均具有发达的微孔结构,在0.4~0.8nm连续分布;A型硅胶经500℃活化,且[bmim]PF6用量为20%（质量分数）时,负载样品具有较好的CO2吸附性能,273K和0.1 MPa时为3.68%（质量分数）;载体中引入[bmim]PF6,可以协同提高负载样品的CO2吸附量和CO2/N2选择性,且吸附速率高于纯[bmim]PF6。Two types of ionic liquids were immobilized on type-A and type-B silica gels through impregnation respectively. The effects of the type and activation temperature of silica support, the type and the loading amount of ionic liquid, and pore diameter distribution （PSD） on CO2 adsorption property were investigated. The results showed that the well-developed pore structure was formed in all adsorbents and PSD mainly concentrated in 0. 4--0. 8 nnx The COz adsorption property was superior through [bmim]PF6 ionic liquid （20~） and type-A silica-gel activated at high temperature （500 ℃）. The COz adsorption on the [bmim] PF6 ionic liquid-immobilized type-A silica can reach 3.68 wt% at 273 K and 0. 1 MPa. The immobilized [-bmim-]PF6 could also improve CO2/Nz selectivity and its adsorp- tion rate was higher than pure [bmim]PF6.

关 键 词：离子液体 CO2 吸附 浸渍法 

分 类 号：TQ252.3[化学工程—有机化工]