CO2/N2 separation using supported ionic liquid membranes with green and cost-effective[Choline] [Pro]/PEG200 mixtures

doi:10.1016/j.cjche.2016.03.006

Chin.J.Chem.Eng. ›› 2016, Vol. 24 ›› Issue (11): 1513-1521.DOI: 10.1016/j.cjche.2016.03.006

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CO₂/N₂ separation using supported ionic liquid membranes with green and cost-effective[Choline] [Pro]/PEG200 mixtures

Tengteng Fan¹, Wenlong Xie¹, Xiaoyan Ji², Chang Liu¹, Xin Feng¹, Xiaohua Lu¹

1 College of Chemistry and Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, China;
2 Division of Energy Science/Energy Engineering, Luleå University of Technology, 97187 Luleå, Sweden

Received:2016-02-29 Revised:2016-03-27 Online:2016-12-06 Published:2016-11-28
Contact: Xin Feng
Supported by:
Supported by the National Basic Research Program of China (2013CB733501), the National Natural Science Foundation of China (21136004, 21176112, 21476106, and 21428601), Specialized Research Fund for the Doctoral Program of Higher Education (No. 20133221110001) and the Project of Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

CO₂/N₂ separation using supported ionic liquid membranes with green and cost-effective[Choline] [Pro]/PEG200 mixtures

Tengteng Fan¹, Wenlong Xie¹, Xiaoyan Ji², Chang Liu¹, Xin Feng¹, Xiaohua Lu¹

1 College of Chemistry and Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, China;
2 Division of Energy Science/Energy Engineering, Luleå University of Technology, 97187 Luleå, Sweden

通讯作者: Xin Feng
基金资助:
Supported by the National Basic Research Program of China (2013CB733501), the National Natural Science Foundation of China (21136004, 21176112, 21476106, and 21428601), Specialized Research Fund for the Doctoral Program of Higher Education (No. 20133221110001) and the Project of Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

Abstract

Abstract: The high price and toxicity of ionic liquids (ILs) have limited the design and application of supported ionic liquid membranes (SILMs) for CO₂ separation in both academic and industrial fields. In this work,[Choline] [Pro]/polyethylene glycol 200 (PEG200) mixtures were selected to prepare novel SILMs because of their green and costeffective characterization, and the CO₂/N₂ separation with the prepared SILMs was investigated experimentally at temperatures from 308.15 to 343.15 K. The temperature effect on the permeability, solubility and diffusivity of CO₂ was modeled with the Arrhenius equation. A competitive performance of the prepared SILMs was observed with high CO₂ permeability ranged in 343.3-1798.6 barrer and high CO₂/N₂ selectivity from 7.9 to 34.8. It was also found that the CO₂ permeability increased 3 times by decreasing the viscosity of liquids from 370 to 38 mPa·s. In addition, the inherent mechanism behind the significant permeability enhancement was revealed based on the diffusion-reaction theory, i.e. with the addition of PEG200, the overall resistance was substantially decreased and the SILMs process was switched from diffusion-control to reaction-control.

Key words: CO₂/N₂ separation, Supported ionic liquid membranes (SILMs), [Choline] [Pro]/PEG200, Diffusion-reaction theory

摘要： The high price and toxicity of ionic liquids (ILs) have limited the design and application of supported ionic liquid membranes (SILMs) for CO₂ separation in both academic and industrial fields. In this work,[Choline] [Pro]/polyethylene glycol 200 (PEG200) mixtures were selected to prepare novel SILMs because of their green and costeffective characterization, and the CO₂/N₂ separation with the prepared SILMs was investigated experimentally at temperatures from 308.15 to 343.15 K. The temperature effect on the permeability, solubility and diffusivity of CO₂ was modeled with the Arrhenius equation. A competitive performance of the prepared SILMs was observed with high CO₂ permeability ranged in 343.3-1798.6 barrer and high CO₂/N₂ selectivity from 7.9 to 34.8. It was also found that the CO₂ permeability increased 3 times by decreasing the viscosity of liquids from 370 to 38 mPa·s. In addition, the inherent mechanism behind the significant permeability enhancement was revealed based on the diffusion-reaction theory, i.e. with the addition of PEG200, the overall resistance was substantially decreased and the SILMs process was switched from diffusion-control to reaction-control.

关键词: CO₂/N₂ separation, Supported ionic liquid membranes (SILMs), [Choline] [Pro]/PEG200, Diffusion-reaction theory

Tengteng Fan, Wenlong Xie, Xiaoyan Ji, Chang Liu, Xin Feng, Xiaohua Lu. CO₂/N₂ separation using supported ionic liquid membranes with green and cost-effective[Choline] [Pro]/PEG200 mixtures[J]. Chin.J.Chem.Eng., 2016, 24(11): 1513-1521.

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CO₂/N₂ separation using supported ionic liquid membranes with green and cost-effective[Choline] [Pro]/PEG200 mixtures

CO₂/N₂ separation using supported ionic liquid membranes with green and cost-effective[Choline] [Pro]/PEG200 mixtures

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