AgBF4/[emim][BF4] supported ionic liquid membrane for carbon monoxide/nitrogen separation

论文摘要

In this paper,AgBF4/[emim][BF4] supported ionic liquid membranes（SILMs） were prepared successfully for CO/N2 separation using nitrogen pressure immobilization procedures.The incorporation of AgBF4 could decrease membrane weight loss,improve the pressure-resistant ability,and keep the critical pressure（0.45 MPa） of the SILMs.The high viscosity and undissolved Ag BF4 solids in membrane liquid would disturb gas molecular transport through membrane and give rise to the gas transport resistance.Therefore,the gas permeability decreased remarkably with increasing AgBF4 carrier content in the membrane.When the molar ratio of AgBF4 to [emim][BF4] increased from 0:1 to 0.3:1,the CO/N2 selectivity of the SILMs showed a great increase from ～1 to ～9 at 20 °C and 0.4 MPa,suggesting that AgBF4 was an effective carrier for CO facilitated transport.The permeabilities of N2 and CO increased at higher transmembrane pressure,indicating that molecular transport would dominate the transport process at high pressure.The temperature-dependent gas permeability followed the Arrhenius equation.Moreover,the differences between the activation energies of CO and N2 became larger after introducing AgBF4,resulting in more obvious decrease in the CO/N2 selectivity at higher operating temperature.

论文目录

• 1. Introduction
• 2. Experimental
•   2.1. Materials
•   2.2. Preparation of AgBF4/[emim][BF4]SILMs
•   2.3. Scanning electron microscopy （SEM）
•   2.4. Stability characterization
•   2.5. Determination of viscosity
•   2.6. Permeation measurements
• 3. Results and discussion
•   3.1. Morphology analysis of AgBF4/[emim][BF4]SILMs
•   3.2. Stability of the AgBF4/[emim][BF4]SILMs
•   3.3. Effect of AgBF4concentration on the performance of AgBF4/[emim][BF4]SILMs
•   3.4. Effect of transmembrane pressure on the performance of AgBF4/[emim][BF4]SILMs
•   3.5. Effect of operating temperature on the performance of AgBF4/[emim][BF4]SILMs
• 4. Conclusions

文章来源

类型: 期刊论文

作者: Shichao Feng,Yuanyuan Wu,Jianquan Luo,Yinhua Wan

来源: Journal of Energy Chemistry 2019年02期

年度: 2019

分类: 工程科技Ⅰ辑

专业: 无机化工,有机化工

单位: State Key Laboratory of Biochemical Engineering,Institute of Process Engineering,Chinese Academy of Sciences

基金: Financial support from the National Natural Science Foundation of China (21406235)

分类号: TQ051.893

页码: 31-39

总页数: 9

文件大小: 1067K

下载量: 15