摘要
分别采用浸渍法和溶胶-凝胶法将1-丁基-3-甲基咪唑四氟硼酸离子液体固载在A型和B型硅胶上,并对硅胶固载离子液体样品进行了FTIR、SEM、元素分析和CO2吸附表征。研究了负载方法、离子液体负载量、孔径分布等对CO2吸附性能的影响。结果表明:采用溶胶-凝胶法固载的离子液体负载量远远大于浸渍法的;制备的吸附剂均具有发达的微孔结构,且在0.4～0.8 nm有连续的分布;浸渍法制备的硅胶固载离子液体的CO2吸附性能较优,在273 K、0.1 MPa时,A型硅胶浸渍离子液体和乙醇混合液样品的CO2吸附量达1.92%。
1-Butyl-3-methylimidazolium tetrafluoroborate is immobilized on type-A and type-B silica-gels through impregnation and sol-gel method, respectively. The formed silica gel confined imidazolium ionic liquids are analyzed by FTIR, SEM, elemental analysis and CO： adsorption method. The effects of the immobilization method, the loading amount of ionic liquid and pore diameter distribution on CO2 adsorption property are investigated. The results show that, loading amount of ionic liquid made by the sol-gel method is much larger than that of by the impregnation method. The well- developed pore structure are formed in all silica-immobilized ionic liquids and the pore size distribution （PSD） mainly concentrates in 0. 4 -0. 8 nm. The CO： adsorption property of the silica-gel-immobilized imidazolium ionic liquid made through impregnation is superior and the C02 adsorption of the mixture of type-A silica-gel-immobilized imidazolium ionic liquid and ethanol can reach 1.92%.
出处
《现代化工》
CAS
CSCD
北大核心
2011年第11期45-48,共4页
Modern Chemical Industry
基金
国家自然科学基金资助项目(20807056)
