Thin Ionic Liquid Membranes Based on Inorganic Supports with Different Pore Sizes
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- 作者：Jonathan Albo ; Toshinori Tsuru
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2014
- 出版时间：May 14, 2014
- 年：2014
- 卷：53
- 期：19
- 页码：8045-8056
- 全文大小：539K
- 年卷期：v.53,no.19(May 14, 2014)
- ISSN：1520-5045
文摘
Nanoporous TiO2 and SiO2鈥揨rO2 membranes with controlled pore sizes were prepared by sol鈥揼el processing and combined with a high CO2 solubility ionic liquid, 1-ethyl-3-methylimidazolium acetate ([emim][Ac]), by hand-coating the ionic liquid onto the membrane surface, and then by a spray-coating procedure. The CO2 permeation through SILMs based on a support with 20 nm pores (SILM-20), PCO2 = 2.28 卤 0.16 脳 10鈥? mol/(m2路s路Pa), was 62% higher than that permeance obtained for SILMs with 1 nm pore sizes (SILM-1). Besides, the activation energy for permeation increased for membranes with smaller pore sizes, which suggested that the properties of the ionic liquid were influenced by the interaction with the membrane pore surface. The membranes prepared by spray coating revealed a CO2 permeance as high as PCO2 = 4.31 卤 0.13 脳 10鈥? mol/(m2路s路Pa), with an ideal CO2/N2 selectivity of 伪(CO2/N2) = 31.18 卤 1.34, which outperformed the current state-of-the-art materials for CO2/N2 separation.