Permeability and Selectivity of Sulfur Dioxide and Carbon Dioxide in Supported Ionic Liquid Membranes

CIESC Journal ›› 2009, Vol. 17 ›› Issue (4): 594-601.

Permeability and Selectivity of Sulfur Dioxide and Carbon Dioxide in Supported Ionic Liquid Membranes

江滢滢, 吴有庭, 王文婷, 李磊, 周政, 张志炳

Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China

收稿日期:2008-11-10 修回日期:2009-03-02 出版日期:2009-08-28 发布日期:2010-12-30
通讯作者: WU Youting, E-mail: ytwu@nju.edu.cn
作者简介:
基金资助:
Supported by the National Natural Science Foundation of China(20776065);the Natural Science Foundation of Jiangsu Province(BK2008023);the National Found for Fostering Talents of Basic Science(J0630425)

Permeability and Selectivity of Sulfur Dioxide and Carbon Dioxide in Supported Ionic Liquid Membranes

JIANG Yingying, WU Youting, WANG Wenting, LI Lei, ZHOU Zheng, ZHANG Zhibing

Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China

Received:2008-11-10 Revised:2009-03-02 Online:2009-08-28 Published:2010-12-30
Supported by:
Supported by the National Natural Science Foundation of China(20776065);the Natural Science Foundation of Jiangsu Province(BK2008023);the National Found for Fostering Talents of Basic Science(J0630425)

摘要/Abstract

摘要： Permeabilities and selectivities of gases such as carbon dioxide(CO₂),sulfur dioxide(SO₂),nitrogen(N₂)and methane(CH₄)in six imidazolium-based ionic liquids([emim][BF₄],[bmim][BF₄],[bmim][PF₆₄],[bmim][Tf₂N]and[emim][CF₃SO₃])supported on polyethersulfone microfiltration membranes are investigated in a single gas feed system using nitrogen as the environment and reference component at temperature from 25 to 45℃ and pressure of N₂₂ has the highest permeability in the tested supported ionic liquid membranes,being an order of magnitude higher than that of CO₂,and about 2 to 3 orders of magnitude larger than those of N₂ and CH₄.The observed selectivity of SO₂ over the two ordinary gas components is also striking.It is shown experimentally that the dissolution and transport of gas components in the supported ionic liquid membranes,as well as the nature of ionic liquids play important roles in the gas permeation.A nonlinear increase of permeation rate with temperature and operation pressure is also observed for all sample gases.By considering the factors that influence the permeabilities and selectivities of CO₂ and SO₂,it is expected to develop an optimal supported ionic liquid membrane technology for the isolation of acidic gases in the near future.

关键词: permeation, gas separation, ionic liquid, supported ionic liquid membrane, acidic gas

Abstract: Permeabilities and selectivities of gases such as carbon dioxide(CO₂),sulfur dioxide(SO₂),nitrogen(N₂)and methane(CH₄)in six imidazolium-based ionic liquids([emim][BF₄],[bmim][BF₄],[bmim][PF₆₄],[bmim][Tf₂N]and[emim][CF₃SO₃])supported on polyethersulfone microfiltration membranes are investigated in a single gas feed system using nitrogen as the environment and reference component at temperature from 25 to 45℃ and pressure of N₂₂ has the highest permeability in the tested supported ionic liquid membranes,being an order of magnitude higher than that of CO₂,and about 2 to 3 orders of magnitude larger than those of N₂ and CH₄.The observed selectivity of SO₂ over the two ordinary gas components is also striking.It is shown experimentally that the dissolution and transport of gas components in the supported ionic liquid membranes,as well as the nature of ionic liquids play important roles in the gas permeation.A nonlinear increase of permeation rate with temperature and operation pressure is also observed for all sample gases.By considering the factors that influence the permeabilities and selectivities of CO₂ and SO₂,it is expected to develop an optimal supported ionic liquid membrane technology for the isolation of acidic gases in the near future.

Key words: permeation, gas separation, ionic liquid, supported ionic liquid membrane, acidic gas

江滢滢, 吴有庭, 王文婷, 李磊, 周政, 张志炳. Permeability and Selectivity of Sulfur Dioxide and Carbon Dioxide in Supported Ionic Liquid Membranes[J]. CIESC Journal, 2009, 17(4): 594-601.

JIANG Yingying, WU Youting, WANG Wenting, LI Lei, ZHOU Zheng, ZHANG Zhibing. Permeability and Selectivity of Sulfur Dioxide and Carbon Dioxide in Supported Ionic Liquid Membranes[J]. , 2009, 17(4): 594-601.

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Permeability and Selectivity of Sulfur Dioxide and Carbon Dioxide in Supported Ionic Liquid Membranes

Permeability and Selectivity of Sulfur Dioxide and Carbon Dioxide in Supported Ionic Liquid Membranes

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