Preparation and SO2 Sorption/Desorption Behavior of an Ionic Liquid Supported on Porous Silica Particles
Preparation and SO2 Sorption/Desorption Behavior of an Ionic Liquid Supported on Porous Silica Particles
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DOI：
10.1021/ie801165u
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发表时间：
2009-02-18
影响因子：
4.2
通讯作者：
Zhu, Shiping
中科院分区：
文献类型：
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作者：
Zhang, Zhengmin;Wu, Linbo;Zhu, Shiping
采用浸渍汽化法将离子液体1,1,3,3-四甲基乳酸胍（TMGL）负载在多孔二氧化硅颗粒上。tmgl支持的颗粒具有高孔隙率和大比表面积。对二氧化硅负载TMGL （TMGL- sio2）的SO2吸附/解吸性能进行了评价，获得了较高的SO2吸附量和速率。在SO2纯气体条件下，其容量在15 ~ 30 min内达到0.6 g SO2/g TMGL；在SO2浓度为2160 ppm的N-2/SO2混合气体条件下，其容量在17 h内达到0.15 g SO2/g TMGL。吸附后SO2浓度降至12.6 ppm。TMGL-SiO2系统可以重复使用多次吸附/解吸循环而不改变其容量。SO2吸附剂体系在高达130℃的温度下具有良好的机械强度和热稳定性。
The ionic liquid 1,1,3,3-tetramethylguanidinium lactate (TMGL) was supported onto porous silica particles via a facile impregnation-vaporization method. The TMGL-supported particles gave high porosity and large specific surface area. The SO2 sorption/desorption properties of the silica-supported TMGL (TMGL-SiO2) were evaluated, and high SO2 sorption capacity and rate were achieved. Its capacity reached 0.6 g SO2/g TMGL in 15-30 min with pure SO2 gas and 0.15 g SO2/g TMGL in 17 h with a N-2/SO2 mixture gas that contained 2160 ppm SO2. The SO2 concentration was reduced to 12.6 ppm after sorption. The TMGL-SiO2 system could be reused for many sorption/desorption cycles without change in its capacity. It was also characterized by good mechanical strength and thermal stability at temperature up to 130 degrees C. The SO2 sorbent system appears to be useful in gas desulfurization.