Gas dehydration using the ionic liquid [EMIM][MeSO3] supported on silica gel – Structural and water vapor sorption properties
Gas dehydration using the ionic liquid [EMIM][MeSO3] supported on silica gel – Structural and water vapor sorption properties
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DOI：
10.1016/j.cej.2020.124689
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发表时间：
2020-03
影响因子：
15.1
通讯作者：
Florian Radakovitsch;A. Jess
中科院分区：
文献类型：
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作者：
Florian Radakovitsch;A. Jess
研究了负载型离子液体相（SILP）材料的结构和水蒸气吸附性能，这里的离子液体[EMIM][MeSO 3]涂覆在硅胶上。IL在二氧化硅载体上的分布是均匀的。SILP的孔隙率显示出与基于纯IL的密度的预期值良好的一致性。纯[EMIM][MeSO 3]以及SILP中的水吸附可以通过Guggenheim-Anderson-de Boer吸附等温线来描述。如果二氧化硅表面被至少一个完整的IL单层覆盖，则表面对吸附容量没有明显的影响，并且SILP的容量对应于纯IL的容量，直到发生毛细冷凝。SILP是用于气体脱水的有希望的候选者，因为与未涂覆的二氧化硅相比，每质量二氧化硅的吸水能力高约六倍。
Structural and water vapor sorption properties of supported ionic liquid phase (SILP) materials, here of the ionic liquid [EMIM][MeSO3] coated on silica gels, were studied. The distribution of the IL over the silica supports is uniform. The porosity of the SILPs shows good agreement with expected values based on the density of the pure IL. The water sorption in pure [EMIM][MeSO3] as well as by the SILPs can be described by Guggenheim-Anderson-de Boer sorption isotherms. If the silica surface is covered by at least a complete monolayer of IL, the surface has no noticeable effect on the sorption capacity, and the capacity of the SILP corresponds to that of the pure IL until capillary condensation occurs. SILPs are promising candidates for gas dehydration, as the water sorption capacity per mass of silica is about six times higher compared to uncoated silica.