采用浸渍法和嫁接法将季鏻类离子液体固载于活性炭载体上,并对其进行了红外光谱、热重和扫描电镜表征。研究了离子液体的固载方法及负载量等参数对孔道特征、CO2吸附选择性、抗水性及循环使用性能的影响。结果表明:浸渍法制备的活性炭固载样品具有较高的固载量,高达26.07%(wt,质量分数,下同),而嫁接法制备的固载样品能较好地保持载体发达的孔道结构。制得的硅胶负载季鏻离子液体对CO2具有良好的吸附性能,在0.1MPa和25℃下,样品Si-P8T/AC-Gr对CO2的吸附量达10.12%,显著提高了CO2/N2的吸附选择性和抗水性能,同时具有良好的循环使用性和稳定性。
The immobilization of phosphonium-based ionic liquid into activated carbon support were carried out with impregnation and grafting methods,and the modified particles were characterized via FT-IR,TG and SEM analysis.The effects of immobilization method and loading amount of ionic liquid on the pore structure,CO2 adsorption selectivity,water tolerance and recycle performance were investigated.The results showed that activated carbon immobilized sample prepared by impregnation had a higher loading amount of ionic liquid about 26.07wt%,while immobilized sample with grafting method can maintain the developed pore structure of carrier.The samples exhibited the excellent performance towards carbon dioxide and CO2.The adsorption capacity of Si-P8T/AC-Gr was 10.12wt% at 0.1MPa and 25℃.Compared with activated carbon,the ionic liquid exhibited significantly improvement of the adsorption selectivity of CO2/N2,the water resistance and recyclability.
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基金资助
中央高校基本科研业务费专项基金(2015XKMS044);江苏省高校优势学科建设工程资助项目
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