Dehumidification of air using liquid membranes with ionic liquids
Dehumidification of air using liquid membranes with ionic liquids
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DOI：
10.1016/j.memsci.2015.10.069
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发表时间：
2016-02-01
影响因子：
9.5
通讯作者：
Ito, Akira
中科院分区：
文献类型：
--
作者：
Kudasheva, Alina;Kamiya, Tomoki;Ito, Akira
本文介绍了吸湿离子液体1-乙基-3-甲基咪唑乙基硫酸盐、1-乙基-3-甲基咪唑二氰胺盐和1-乙基-3-甲基咪唑四氟硼酸盐在膜基空气过滤器中的应用。制备了由疏水多孔膜支撑的液膜，并根据水回收率和水蒸气渗透率评价了其分离效率。由离子液体组成的支撑液膜的性能比含有三甘醇的支撑液膜的性能更高。离子液体显示从80%RH湿空气中回收高达10 g/h的水。水蒸气通过离子液体的渗透率为26，000 - 46，000 Barrer，并且对空气的分离因子超过1000。这些测得的渗透率进行了比较，预测的溶液扩散机制，这是支持的吸附，扩散率和粘度测量的液体。结果表明，溶解-扩散机制很好地描述了空气通过离子液体膜的传输，并与进一步的考虑，可以适用于描述水蒸气在离子液体中的传输。(C)2015 Elsevier B. V.版权所有。
This paper presents application of the hygroscopic ionic liquids, such as 1-ethyl-3-methylimidazolium ethylsulfate, 1-ethyl-3-methylimidazolium dicyanamide and 1-ethyl-3-methylimidazolium tetrafluoroborate, for the membrane-based air dehumidification. Liquid membranes, supported by the hydrophobic porous membrane, were prepared and their dehumidification efficiency was evaluated in terms of the water recovery rate and water vapor permeability. The performance of supported liquid membranes, composed of ionic liquid, was higher when compared to that, containing triethylene glycol. Ionic liquids showed recovery of water from 80%RH humid air as high as 10 g/h.The permeabilities of water vapor through the ionic liquids were 26,000-46,000 Barrer and the separation factor to the air was over 1000. These measured permeabilities were compared to that predicted by the solution diffusion mechanism, which was supported by the adsorption, diffusivity and viscosity measurements of the liquids. It was demonstrated that solution-diffusion mechanism well describes transport of air through the ionic liquid membrane and with further considerations can be applied for the description of water vapor transport in ILs. (C) 2015 Elsevier B.V. All rights reserved.